Celtic Britain. Cantii, Sego, AR unit. ca. AD 5-15, 1.33 g. "Guilloche" type.

SEGO in rectangular frame in a circle of interwoven cords.
Warrior on horseback riding right.

VA 1851-1; Seaby 260; ABC 447. 

With permission of Spink auction 15049, Lot 49, Dec. 2015