Engagement Ring Hallmarked A.H&S

by Jenny
(uk)

Hi, I'm trying to find out some information on my Grans engagement ring. Is there any way to find out about the hallmark? I'm assuming that the A.H&S is the maker's mark. There is also the number 5 (which you can't see in the photo, it's just out of shot on the left side of the picture). It's engraved into the metal rather than being raised letters in like the rest of the mark.

Thanks for you help