The Drachm denomination
The Drachm (meaning 'handful') was the standard unit of silver coinage at most ancient Greek mints.

While a drachm was always divided into 6 obols, the actual weight was dependent on the standard used. Under the attic standard, a drachm weighed 4,3 grams, under the Corinthian standard 2,9 grams, and the Aeginan standard defined it as 6,1 grams. And that's only three of them.

Drachms were also struck in bronze, most notably in Ptolemaic Egypt.
Drachm

(1) Alexander III 323-200 BC ?
AR Drachm Unknown mint
Obverse: Head of young Heracles in lionskin right countermark: Kalchedon ? - head of Demeter ?, bee below, (KA) right
Reverse: Zeus enthroned left, holding eagle and scepter AΛEΞANΔPOY
Ref: zum Gegenstempel vgl. Price, Alexan...
(2) Alexander III c. 290-275 BC
Obverse: head of young Heracles in lionskin right
Reverse: Zeus enthroned left, holding eagle and scepter; grape bunch AΛEΞANΔPOY (ΠYPΦ)
Ref: Price 2322; HGC 6, 1134
(3) Alexander III 325-323 BC
Obverse: Head of Herakles to right, wearing lion skin headdress
Reverse: Zeus enthroned left, holding eagle and sceptre, monogram on left / AΛEΞANΔPOY
Ref: Price 2121, Müller 847
(4) Alexander III 336-323 BC
Obverse: Head of Herakles right, wearing lion skin.
Reverse: Reverse: Zeus Aëtophoros seated left; griffin head in left field.
Ref: Price 2536; (Thompson) ADM I Serie...
(5) Alexander III | Antigones I c. 310-301 BC
Obverse: head of young Heracles in lion's skin right
Reverse: Zeus enthroned left, holding eagle and scepter, forepart of pegasus left in the left field; AΛEΞANΔPOY / (NO)
Ref: Price 1382; Müller 612
(6) Alexander III | Philip III 322-319 BC
Obverse: head of young Heracles in lion's skin right
Reverse: Zeus enthroned left, holding eagle and scepter, barleycorn under throne, spear-spike right AΛEΞANΔPOY
Ref: Price 1751
(7) Antigones I c. 310-301 BC
Obverse: Head of Herakles right, wearing lion's skin
Reverse: Zeus Aëtophoros seated left; N in left field; Σ below throne.
Ref: Price 1802
(8) Antiochus VII 138-129 BC
AR Drachm Unknown mint
Obverse: Diademed head right
Reverse: ΒΑΣΙΛΕΩΣ ΑΝΤΙΟΧΟΥ EYEPΓETOY / Nike advancing left holding wreath; monogram in outer left field
Ref: None provided
(9) Antoninus Pius 158-159 AD
Obverse: laureate head right; TI AI AΔPIA ANTΩNINOC CEB EV
Reverse: Hermanubis standing right, modius on head, himation on legs, holding caduceus and long palm, jackal left, head turned back; L _ B / K
Ref: Geissen 1831, Milne 2389, Emmett 15...
(10) Antoninus Pius 138 AD
Obverse: bare draped bust right seen from behind; AVTO T·AIΛIOC·KAICAP·ANTWNEINOC·
Reverse: Tyche standing half left, holding rudder and cornucopia; AMICOV EΛEVΘE_PAC ETOVC PΞΘ
Ref: RPC Online 1296. R.G. 109
(11) Apollonia Pontica c. 450-404 BC
Obverse: facing head of Medusa
Reverse: anchor flukes up; A / crayfish
Ref: SNG Cop 456; SNG BM 160, SNG Stanco...
(12) Archelaus 3-4 AD
Obverse: diademed head right
Reverse: club; ΒΑΣΙΛΕΩΣ APXEΛΑΟΥ ΦΙΛΟΠΑΤΡΙΔΟΣ TOY ΚΤΙΣΤΟΥ / Λ_Θ
Ref: ?
(13) Ariarathes IX 96-95 BC
Obverse: diademed head right
Reverse: Athena standing left, holding Nike with wreath, resting hand on spear and shield; BAΣIΛEΩΣ / APIAPAΘOY / EYΣEBOYΣ // (ΠI) / E
Ref: Simonetta 4c
(14) Ariarathes V 131-130 BC
Obverse: diademed head right
Reverse: Athena standing left, holding Nike and resting hand on grounded shield; BAΣIΛEΩΣ / APIAPAΘOY / EYΣ[E!]BOYΣ, (AY) left; (ΠAΦI) in the middle; (ΔI) right, ΛΓ - year 33
Ref: Simonetta 13 (var)
(15) Ariarathes VI 129-128 BC
Obverse: diademed head right
Reverse: Athena holding spear and Nike, shield at her feet; BAΣIΛEΩΣ / APIAPAΘOY / EΠIΦANOYΣ, M / A
Ref: Simonetta Collection 10, Simonetta ...
(16) Ariarathes VII 106 BC
Obverse: Diademed head right
Reverse: Athena holding spear and Nike, shield at her feet; BAΣIΛEΩΣ / APIAPAΘOY / ΦIΛOMHTOPOΣ, M / K / IA
Ref: SNGCop 141
(17) Ariarathes VIII 99-98 BC
Obverse: diademed head right
Reverse: Athena holding spear and Nike, shield at her feet; BAΣIΛEΩΣ / APIAPAΘOY / EYΣEBOYΣ, T_Λ / B
Ref: Simonetta (2007), 12 (Ariarathes V....
(18) Ariobarzanes I 67-66 BC
Obverse: diademed head right
Reverse: Athena standing left, holding Nike with wreath, spear and shield; BAΣIΛEΩΣ / APIOBAPZANOY / ΦIΛOPΩMAIOY, (MT) / ΘK
Ref: Simonetta 40b
(19) Ariobarzanes II 56 BC ?
Obverse: diademed head right
Reverse: Athena holding spear and Nike, shield at her feet; BAΣIΛEΩΣ / APIOBAPZANO[Y] / ΦIΛOPATOP, Z?
Ref: BMC Greek (Galatia) 1.p41; Simonett...
(20) Ariobarzanes III 52-42 BC
Obverse: Diademed, bearded head of king right
Reverse: ΒΑΣΙΛΕΩΣ ΑΡΙΟΒΑΡΖΑΝΟΥ ΕΥΣΕΒΟΥΣ ΚΑΙ ΦΙΛΟΡΩΜΑΙΟΥ Athena standing left, holding Nike on outstretched right hand and shield and spear in left hand; in upper right field, monogram; in lower left field, crescent and star; in exergue, [Θ].
Ref: Simonetta 1b. BMC 1. SNG Copenhagen...
(21) Ariobarzanes III 42 BC
Obverse: diademed head right
Reverse: Athena holding spear and Nike, shield at her feet; BAΣIΛEΩΣ / AΡIOBAΡZANOΥ / EΥΣEBOΥΣ / KAI ΦIΛOΡΩM, star over crescent / HXA / IA
Ref: S 7304 var
(22) Ariobarzanes III 42-41 BC
Obverse: Diademed and bearded head of Ariobarnazes to right
Reverse: ΒΑΣΙΛΕΩΣ ΑΡΙΟΒΑΡΖΑΝΟΥ ΕΥΣΕΒΟΥΣ ΚΑΙ ΦΙΛΟΡΩΜΑΙΟΥ / Athena standing left, holding Nike, spear, and shield; star and crescent to left, monogram to right, IA (date) in exergue.
Ref: HGC 7, 853. Simonetta 3a or 3b
(23) Azes II 35 BC - 10 AD
AR Drachm Unknown mint
Obverse:
Reverse:
Ref: None provided
(24) Brettian League c. 216-203 BC
Obverse: laureate head of Zeus right, stalk of grain behind
Reverse: eagle standing left on lightning, cornucopia right, star above; BPET_TIΩN
Ref: SNG ANS 44; SNG Cop 1663; Pfeiler p...
(25) Chalkis 338-308 BC
Obverse: head of nymph Chalkis right
Reverse: eagle holding snake; ΛAX
Ref: Picard Em. 8: BCD Euboia 138-9
(26) de Morgan c. 180-220 AD
Obverse: long beard, diademed bust left
Reverse: Artemis standing right with bow and arrow
Ref: Sear GIC 5919; Mitchiner ACW 721
(27) Demetrius I 152-151 BC
Obverse: diademed head right
Reverse: cornucopiae; BAΣIΛEΩΣ / ΔHMHTPIOY / ΣΩTHPOΣ, A / (ΠA) Π / AΞP
Ref: Houghton 159, Newell, SMA 120, SNG ...
(28) Dyrrhachion 92-48 BC
Obverse: cow standing right, calf standing left, ivy-wreath, tripod right; ΦIΛΩTAΣ, (AΓ)
Reverse: double stellate pattern within double linear square; ΔYP_KΛEI_TOPI_OY
Ref: Ceka 454
(29) Emporion 241-218 BC
Obverse: Head of Persephone right; 3 dolphins around
Reverse: Pegasus flying right; EMΠOPITΩΝ
Ref: Calico 598ff. Villaronga, CNH 20, 1...
(30) Ephesos 500-420 BC
Obverse: bee
Reverse: incuse square
Ref: Karwiese Series VI, 1B; SNG Kayhan ...
(31) Hadrian 132-133 AD
Obverse: laureate and draped bust right; AVT KAIC TPAIAN·_ADPIANOC CEB
Reverse: Tyche standing left, holding rudder and cornucopiae; L IZ
Ref: SRCV II 3770, BMC Alexandria 725, M...
(32) Kamnaskires-Orodes 100-150 AD
Obverse: diademed, long bearded bust facing; pellet inside crescent and double crossbar anchor right
Reverse: dashes
Ref: vant Haaff 12.3.1-2A2; BMC Arabia p...
(33) Khusro I? 531-579 AD
AR Drachm Unknown mint
Obverse: Crowned bust right
Reverse: Fire altar flanked by attendants
Ref: None provided
(34) Khusro II 590-628 AD
Obverse: Crowned bust of Khusro II facing right, Pahlavi script to left and right, inside double circle, crescent with star above on four sides in margin
Reverse: Fire altar with attendants at left and right, Pahlavi script to left and right, inside triple circle, crescent with star above on four sides in margin
Ref: None provided
(35) Khusro II 591-628 AD
AR Drachm Istakhr
Obverse: Crowned bust right.
Reverse: Fire altar and attendants.
Ref: None provided
(36) Korinthos 350-300 BC
Obverse: Pegasus left; Ϙ
Reverse: head of Aphrodite or nymph Peirene left; K
Ref: SNG Vol: III 2129 Lockett Collectio...
(37) Larissa (Thessaly) 356-342 BC
Obverse: head of nymph Larissa facing slightly left
Reverse: horse grazing right; ΛΑΡΙΣ / ΑΙΩΝ
Ref: Lorber Hoard, Phase L-III; cf. SNG ...
(38) Larissa (Thessaly) c. 400-365 BC
Obverse: Head of the nymph Larissa facing slightly left
Reverse: ΛAPI–ΣAIΩN, mare and her foal standing right
Ref: None provided
(39) Menandros I 165-130 BC
Obverse: helmeted draped bust right; BAΣIΛEΩΣ ΣΩTHΡOΣ / MENANΔΡOΥ
Reverse: Athena Alkidemos left hurling lightning and holding shield; Mahara_ja_sa Tratarasa / Menadrasa, (HΔIM)
Ref: SNG ANS 879 ff., Bopearachchi 16I, ...
(40) Mithradates II 119-109 BC
Obverse: bearded diademed bust left
Reverse: archer without beard, with cloak and bashlyk seated on throne, holding bow; ΒΑΣΙΛΕΩΣ ΜΕΓΑΛΟΥ ΑΡΣΑΚΟΥ ΕΠΙΦΑΝΟΥΣ
Ref: Sellwood 26.1; Shore 77
(41) Mithradates II 123-88 BC
AR Drachm Unknown mint
Obverse: Long-bearded bust left wearing tiara
Reverse: Beardless archer wearing bashlyk and cloak seated right on throne, holding bow in right hand; no border; six-line Greek inscription
Ref: Sellwood 29, feine Tönung, kl.Sr., ...
(42) Mithradates III 87-79 BCE
Obverse: Bearded bust left wearing tiara with eight-pointed star, pellet ended torque
Reverse: ΒΑΣΙΛΕΩΣ ΜΕΓΑΛΟΥ ΑΡΣΑΚΟΥ ΑΥΤΟΚΡΑΤΟΡΟΣ ΦΙΛΟΠΑΤΟΡΟΣ ΕΠΙΦΑΝΟΥΣ ΦΙΛΕΛΛΗΝΟΣ (Beardless archer wearing bashlyk and cloak seated right on throne, holding bow in right hand)
Ref: Sellwood 31.6
(43) Mithradates III 87-79 BC
Obverse: bearded bust with tiara
Reverse: archer without beard, with cloak and bashlyk seated on throne, holding bow; ΒΑΣΙΛΕΩΣ ΜΕΓΑΛΟΥ ΑΡΣΑΚΟΥ ΑΥΤΟΚΡΑΤΟΡΟΣ ΦΙΛΟΠΑΤΟΡΟΣ ΦΙΛΕΛΛΗΝΟΣ ΕΠΙΦΑΝΟΥΣ, Δ above foot
Ref: Sellwood 31.5 (Orodes I); Shore 123...
(44) Orodes II 57-38 BC
Obverse: bearded and diademed bust left, wart on forehead, torque ends in griffin, star left, crescent over star right
Reverse: archer seated on throne right, wearing balshyk and cloak, holding bow, anchor with trident-like end behind; BAΣIΛEΩΣ BAΣIΛEΩN APΣAKOY EYEPΓETOY ΔIKAIOY EΠIΦANOYΣ ΦIΛEΛΛHNOΣ, (TA)
Ref: Shore 261, Sellwood 48.9, Sunrise 3...
(45) Orodes II 100-150 AD
Obverse: bearded head facing, wearing tiara; pellet inside crescent and anchor with double crossbar right
Reverse: dashes
Ref: vant Haaff 13.3.2-1A; BMC Arabia p....
(46) Parion c. 480 BC
Obverse: head of Medusa (Gorgoneion) facing
Reverse: incuse square with angles in the corners forming cruciform pattern, pellet in center
Ref: SNG BnF 1347; SNG Delepierre 2526; ...
(47) Philip III c. 323 - 319 BC
Obverse: Head of Herakles right, wearing Nemean lion scalp headdress
Reverse: ΦIΛIΠΠOY / Zeus seated left on throne without back, nude to waist, himation around hips and legs, right leg forward, feet on footstool, eagle in extended right hand, long scepter vertical behind in left hand, monogram below throne
Ref: Price P57, Müller Alexander P89a, S...
(48) Phraates 100-150 AD
Obverse: Bearded head left wearing tiara; pellet inside crescent and anchor right
Reverse: Dashes
Ref: van
(49) Ptolemy II 264-256 BC
Obverse: diademed head of Zeus-Ammon
Reverse: 2 eagles standing on lightning left; ΠTOΛEMAIOY_ΒAΣIΛEΩΣ / Λ
Ref: Svornos 479
(50) Ptolemy IV 221-205 BC
Obverse: Diademed head of Zeus-Ammon right.
Reverse: ΠΤΩΛΕΜΑΙΟΥ ΒΑΣΙΛΕΩΣ Eagle standing left on thunderbolt; cornucopiae left, ΔΙ between legs.
Ref: Svoronos 1125; SNG Copenhagen 199.
(51) Rhodos 88-85 BC
Obverse: Radiate head of Helios right.
Reverse: Rose with bud to right. Control: Isis headdress to right; all within incuse square
Ref: Jenkins 246; HGC 6, 1461
(52) Rhodos 188-170 BC
Obverse: radiate head of Helios right
Reverse: rose with bud to right, pileus left all within incuse square; ΣTAΣIΩN / P_O
Ref: Jenkins, Rhodian, Group A, 13; cf. ...
(53) Scordisci ~300-0 BC
AR Drachm Unknown mint
Obverse: Head with point-eyes, ball-cheeks, neckbeard, and moon-shaped ear facing right, wearing a laurel-wreath.
Reverse: Horse to the left, circle above (mostly off flan)
Ref: Kostial 506
(54) Septimius Severus 194 AD
Obverse: laureate head right; AV Λ CEΠ__CEOVHPOC
Reverse: Mount Argaeus, star above; MHTPO__KAICAPI ET B
Ref: Sydenham Caesarea 388; BMC Galatia ...
(55) Shapur II 309-379 CE
AR Drachm Mint IX | Kabul
Obverse: Pahlavi legend (Crowned bust right)
Reverse: Fire altar flanked by attendants, bust right in flames
Ref: SNS III Type Ib1/3a; Göbl Type Ia/6...
(56) Shapur II 309-379 AD
AR Drachm Unknown mint
Obverse: Crowned bust right of Shapur II
Reverse: Fire altar with two attendants; bust right within flames
Ref: Göbl 102
(57) Shri Samanta Deva 950-1000 AD
AR Drachm Unknown mint
Obverse: Knight on horse
Reverse: Bull
Ref: None provided
(58) Sikyon 340-335 BC
Obverse: Dove alighted Left
Reverse: Dove flying Left inside Olive Wreath
Ref: BCD Pelops 224
(59) Sinope 490-425 BC
Obverse: stylized head of eagle left
Reverse: quadripartite incuse square with two opposing quarters filled, the others stippled
Ref: SNG BM Black Sea 1359-63; HGC 7, 38...
(60) Sinope c. 330-300 BC
Obverse: Nymph
Reverse: Eagle with dolphin
Ref: None provided
(61) Tabae 100-1 BC
Obverse: head of Zeus right
Reverse: Artemis standing right, quiver on shoulder, holding torch and arrow; APTEMΩΝ ΠΑΠΙΟΥ__AP TABHNΩΝ
Ref: BMC Greek (Caria, Cos, Rhodes) 19.p...
(62) Trajan 112-113 AD
Obverse: laureate bust right, draped shoulder; AVT TPAIAN C_EB ΓEPM ΔAKIK
Reverse: Trajan in elephant quadriga right, holding laurel branch and eagle-tipped scepter; L IϚ
Ref: Emmett 462 (R3), Geissen 619var (Po...
(63) Trajan 112 AD
Obverse: laureate bust right, draped shoulder; AYTOKP KAIC NEP TPAIAN CEB ΓEPM ΔAK
Reverse: Arabia facing, holding branch and cinnamon sticks, camel halfleft; ∆HMAPX__EΞ IϚ YΠAT Ϛ
Ref: RIC II 142, Woytek 285b, RSC II 89,...
(64) Trajan 98-99 AD
Obverse: laureate head right; AYT KAIC NEP TPAIANOC CEB ΓERM
Reverse: owl standing on two lyres; ΔHM EΞ__YΠAT B
Ref: BMC 10; SNG Copenhagen 45; SNG von ...
(65) Vologases III 111-146 AD
Obverse: diademed bust with long beared and earring
Reverse: archer without beard, with cloak and bashlyk seated on throne, holding bow ;ΒΑΣΙΛΕΩΣ ΒΑΣΙΛΕΩN ΑΡΣΑΚΟΥ ΕΥΕΡΓΕΤΟΥ ΦΙΛΟΠΑΤΟΡΟΣ ΔΙΚΑΙΟΥ ΦΙΛΕΛΛΗΝΟΣ ΕΠΙΦΑΝΟΥΣ, Φ_(TA) monogram
Ref: Sellwood 78.3; Shore 413-4.
(66) Zoilos II 55-35 BCE
AR Drachm Unknown mint
Obverse: ΒΑΣΙΛΕΩΣ ΣΩΤΗΡΟΣ ΖΟΙΛΟΥ (Diademed and draped bust right)
Reverse: Maharajasa tratarasa Jhoilasa (Athena Promachos advancing left, hurling thunderbolt and holding shield), monograms in field
Ref: None provided