Watch List notes:

Decentius. Caesar, AD 350/1-353. Æ (21mm, 2.05 g, 6h). Ambianum (Amiens) mint/Lugdunum (Lyon) mint. Struck circa AD 351-352. Bareheaded, draped, and cuirassed bust right / Two Victories standing facing one another, holding round shield inscribed VOT/V/MVLT/X in four lines on column, S-V to either side; (palm)AMB(palm). RIC VIII –, cf. 8 var.; Bastien –, cf. 108 var.. Dark brown, glossy patina. EF. Well struck on a broad flan. Rare.

This interesting coin combines the mintmarks for Ambianum (AMB), as well as the reverse field letters S-V, which are only found on issues of Lugdunum.