Silver penny of Burgred of Mercia. This is what is known as the "vertical style". It is Seaby 941.
The obverse reads BVRGRED REX and shows a helmeted Burgred facing right.
The reverse shows in three lines MON GRVN ETA
Made from a modern die cut by a master craftsman to represent this type and hand struck from pewter. The die maker has used the name Grunal as the moneyer on the coin.