British Celts, Tincommius. AR unit. 12 mm, 1.19 g. ca. 25-20 BC. 

Roman style, laureate head right.
TIN-CO above and beneath bull leaping right.

Van Arsdell 381; Seaby 85; BMC 911-925.

With permission of Spink Ltd, auction 1011, Lot 118, Sept. 2010.