Offa, King of Mercia, AR penny, Canterbury mint. Moneyer Tirwald. AD 757-796. 1.21 gm. 16 mm. 

OFFA REX as single letters in crescents around a small
flower within a circle.
TIRWALD around circle with floral ornament within.

Seaby 904; BMC Anglo Saxon 16; EMC 2004.0070.

Courtesy of Baldwins Co. Lts, item FM44475, Dec. 2015.