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.

 
                
                
                
                
                                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
                        
                    
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