The groat is a fourpence coin. Circulation issue groats (like this one) had the Britannia reverse; Maundy Groats did not.
Head of Queen Victoria facing left, ribbon in hair; around, VICTORIA D: G: BRITANNIAR: REGINA F: D:.
||VICTORIA D: G: BRITANNIAR: REGINA F: D:
Figure of Britannia, draped and wearing helmet, seated facing right holding trident and resting right hand on an oval shield which bears the crosses of the Union flag; around, FOUR PENCE; in exergue, the date 1852.
||FOUR PENCE 1852
The Rotographic catalogue "Collectors’ Coins Great Britain 1760 - 1970" lists mintage of 31,300, probably in error (in Remick and Krause, 31,300 is the mintage for 1851). Remick calls the 1851 groat "extremely rare" and doesn't list its mintage.