The sextans was an Ancient Roman bronze coin produced during the Roman Republic valued at one-sixth of an as (2 unciae).
The most common design for the sextans was the bust of Mercury and two pellets (indicating two unciae) on the obverse and the prow of a galley on the reverse.
Earlier types depicted a scallop shell, a caduceus, or other symbols on the obverse.
The most common design for the sextans was the bust of Mercury and two pellets (indicating two unciae) on the obverse and the prow of a galley on the reverse.
Earlier types depicted a scallop shell, a caduceus, or other symbols on the obverse.

(1)
Caelia

Obverse: Head of Athena right wearing crested helmet; ●●
Reverse: Trophy of captured arms, helmet spear, palm branch and shield decoraded with Medusa head; club left; KAIΛIN_ΩN
Diameter:
16.5 mm
Die Orientation: -
Weight: 3.1 g
Die Orientation: -
Weight: 3.1 g
No notes for this coin
HNItaly 762; Weber 439; SNG ANS 670-671; BMC Italy pg. 133, 3; SNG Copenhagen 632; SNG Morcom 201 var.; Laffaille -

Obverse: draped bust of Mercury right wearing winged petasos; ●●
Reverse: prow of galley right, fighting platform with club; ROMA / C /●●
Diameter:
19 mm
Die Orientation: -
Weight: 3.9 g
Die Orientation: -
Weight: 3.9 g
If C really stood for L. Cornelius Lentulus praetor of Sardinia, he would be the first moneyer with name on his coins.
Crawford 63/6, Sydenham 157d, BMCRR Italy 187, SRCV I 1220

Obverse: draped bust of Mercury right wearing winged petasos ●●
Reverse: prow of galley right, fighting platform with club ROMA ●●
Diameter:
19 mm
Die Orientation: -
Weight: 3.8 g
Die Orientation: -
Weight: 3.8 g
Mint in southeast Italy, possibly Apulia (Herdonia?)
Scarce
Crawford 056/06, McCabe F1.Sx.2 Luceria-style (die-match)
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Obverse: draped bust of Mercury right wearing winged petasos ●●
Reverse: prow of galley right, fighting platform with club; grain ear above ROMA ●●
Diameter:
22 mm
Die Orientation: -
Weight: 5.9 g
Die Orientation: -
Weight: 5.9 g
maybe overstrike
ex RBW ex Richard Schäfer
Crawford 72/8; Sydenham 195d; RBW 311