Watch List notes:

Atrebates and Regni, Tincomarus (c. 25BC- 10 AD), silver Unit, 1.23g, 'Cernunnos' facing, rev. bull left, tin above, c below (Cottam 135, same dies; VA 370; S.86; ABC 1109), lightly porous, about very fine, rare.
provenance
Spink 247, 5 July 2017, lot 18
Purchased Rudd, April 2007
Recorded with the Ashmolean Museum, Oxford, ref. CCI 06.0347
Estimate: £150 - £200