Serdica — A settlement in Thrace
Serdica was originally a Thracian settlement, probably named after the Celtic tribe Serdi that had populated it.

Around 29 B.C., it was conquered by the Romans and renamed Ulpia Serdica. When Emperor Diocletian divided the province of Dacia into Dacia Ripensis (on the banks of the Danube) and Dacia Mediterranea, Serdica became the capital of Dacia Mediterranea. Serdica was of moderate size, but magnificent as an urban concept of planning and architecture, with abundant amusements and an active social life.

Dates of operation: 272 - 282, 303 - 308 and 313 - 314. Mintmarks: SD, SER, SERD, SMSD.

Modern location: Sophia, Bulgaria
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An BL Antoninianus struck 272 AD in Serdica
Obverse: IMP C AVRELIANVS PF AVG, Radiate and cuirassed bust right

Reverse: RESTITVT ORBIS, Female figure standing right holding wreath in raised hand, facing Aurelian in military attire standing left his right hand extended, holding sceptre in left, mintmark KA dot gamma

Diameter: -
Die Orientation: -
Weight: -
No notes for this coin
Sear 11592v
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An AE Antoninianus struck 274-275 AD in Serdica
Obverse: radiate, cuirassed bust right; IMP C AVRELIANVS AVG

Reverse: Fides, holding two ensigns facing radiate Sol holding a globe; PRO_VIDEN DE_OR / KAΔ

Diameter: -
Die Orientation: -
Weight: 3.79 g
Serdica issue 8, Phase 3, XI 274 – IX 275 AD
RIC V-1, 284 Serdica var; http://www.ric.mom.fr/en/coin/2824
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An AE Antoninianus struck 273-274 AD in Serdica
Obverse: radiate, cuirassed bust right; IMP AVRELIANVS AVG

Reverse: Emperor in military dress standing right, holding short sceptre in left hand, receiving a globe from Jupiter standing left, holding long sceptre in left hand; IOVI__CON_SER / P

Diameter: -
Die Orientation: -
Weight: 3.5 g
Serdica, issue 4, early 273 – early 274 AD
LV 9802-24; RIC 260; http://www.ric.mom.fr/en/coin/2601
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An AE Antoninianus struck 274 AD in Serdica
Obverse: radiate, cuirassed bust right; IMP AVRELIANVS AVG

Reverse: Sol facing, head left, with right hand raised and holding globe in left; at feet to left a bound and captive in oriental dress; ORIE_NS AVG / P

Diameter: -
Die Orientation: -
Weight: 4.1 g
Serdica issue 5, Phase 2, early 274 AD
LV 9885-9; RIC 276; http://www.ric.mom.fr/en/coin/2634
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An AE Antoninianus struck 274 AD in Serdica
Obverse: radiate, cuirassed bust right; IMP C AVRELIANVS AVG

Reverse: Sol standing left, with right hand raised and holding globe in left, right foot resting on a bound captive in oriental dress standing left; on the other side, another bound captive in oriental dress standing right, head turned left; ORI_ENS AVG / P

Diameter: -
Die Orientation: -
Weight: 3.8 g
Serdica issue 6, Phase 1, spring 274 AD
LV 9899-909; RIC 278; http://www.ric.mom.fr/en/coin/2641
/Files/Images/Coinsite/CoinDB/765_Aurelian_Oriens.jpg
An AE Antoninianus struck 274 AD in Serdica
Obverse: radiate, cuirassed bust right; IMP C AVRELIANVS AVG

Reverse: Sol standing left, with right hand raised and holding globe in left, right foot resting on a bound captive in oriental dress standing left; on the other side, another bound captive in oriental dress standing right, head turned left; ORI_ENS AVG / P

Diameter: -
Die Orientation: -
Weight: 4.1 g
Serdica issue 6, Phase 1, spring 274 AD
LV 9899-909; RIC 278; http://www.ric.mom.fr/en/coin/2641
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An AE Antoninianus struck 273-274 AD in Serdica
Obverse: radiate, cuirassed bust right; IMP AVRELIANVS P AVG

Reverse: Emperor in military dress standing right, holding short sceptre in left hand, receiving a globe from Jupiter standing left, holding long sceptre in left hand; IOVI CON_SER / S

Diameter: -
Die Orientation: -
Weight: 4.25 g
Serdica issue 4, early 273 – early 274 AD scarcer obverse legend
BNC p.394; RIC1st 264 var.; die match: Vienna (75004, Rohde) http://www.ric.mom.fr/en/coin/2623
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An AE Antoninianus struck IV – XI 274 AD in Serdica
Obverse: radiate, cuirassed bust right; IMP AVRELIANVS AVG

Reverse: Sol advancing left, stepping on captive, raising hand and holding globe; seated captive on right; ORI_E_NS AVG / XXI·S·

Diameter: 23 mm
Die Orientation: -
Weight: 3.78 g
Serdica Issue 7, Phase 1, IV – XI 274 AD
RIC V-1, 279 Serdica, Cohen 145 http://www.ric.mom.fr/en/coin/2653
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An AE Antoninianus struck summer 271 AD in Serdica
Obverse: radiate, draped and cuirassed bust right; IMP AVRELIANVS AVG

Reverse: Aurelian in military dress standing right, receiving globe from Jupiter standing left, holding long scepter; IOVI CONSERVATORI / P

Diameter: -
Die Orientation: -
Weight: 3.6 g
summer 271 AD, Issue 1, Phase 2
BNC 993; RIC1st 265 var. http://www.ric.mom.fr/en/coin/2553
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An AE Antoninianus struck July 276 AD in Serdica
Obverse: IMP C M ANNIVS FLORIANVS AVG, Bust of Florian facing right, wearing crown, cuirass, and drapery

Reverse: PROVIDEN DEOR, Fides standing facing right, holding standard in each hand, Sol standing facing left, hand raised and holding globe in left hand, star in between; KAA in exergue

Diameter: 23 mm
Die Orientation: 5 H
Weight: 3.4 g
Silvered (probably tinned actually) AE Antoninianus (technically an Aurelianinus, but virtually no one uses that term)

So the obverse inscription varies from RIC 111 on the ANNIVS bit, RIC 111 is just ANN.
RIC V Florian 111 var. (obv. insc.); www.ric.mom.fr 4463
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An AE Antoninianus struck 276 in Serdica
Obverse: IMP C M ANN FLORIANVS P AVG, radiate, draped and cuirassed bust right

Reverse: PROVIDEN DEOR, Providentia on left, holding two standards; Sol on right, standing left, raising right hand and holding globe, star between

Diameter: 22 mm
Die Orientation: -
Weight: 3.2 g
No notes for this coin
RIC 111, BN 1968
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An BL Follis struck 305-306 AD in Serdica
Obverse: laureate head right; GAL VAL MAXIMINVS NOB CAESAR

Reverse: Genius standing left, wearing modius and chalmys, pouring libations from patera, holding cornucopia; GENIO POPV_L_I ROMANI / Γ / •SM•SD•

Diameter: -
Die Orientation: -
Weight: -
No notes for this coin
RIC VI Serdica 13b; Sear 14743
(13) Probus
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An AE Antoninianus struck 277 AD in Serdica
Obverse: radiate bust left wearing consular robe, holding eagle tipped scepter in right hand; IMP C M AVR PROBVS P F AVG

Reverse: Sol facing in quadriga, head left, wearing chalmys, raising hand, holding whip; S_OL_I INVICTO / KAΓ

Diameter: -
Die Orientation: -
Weight: 4.5 g
Serdica 4th emission, 277 AD
RIC V-2 Serdica 861