Sarah — It's not Cranberry as glassies use the term, which was generally made from a thin layer of intensely coloured ruby glass cased in clear uncoloured crystal, like my preserve dish
here, and generally is Victorian or early C20. Yours looks to me to be a homogenous red or slightly purple-red, which would date it to the middle of C20 at the earliest and most likely post-war.
My advice to the local charity I help would be to put it on the bric-a-brac shelf at £4.99 and break open the champagne if it sells!

Bernard C.
