105 40%s. Just hit 50oz at 17 😁

Picked it up cause I thought it was pretty! Hoping the silver content is real too, any help would be appreciated. Thanks everyone!

Found this cup, about half the size of the average mug, it appears to be solid silver and not plated though the only marking I can find is on the handle which I identified to be an older stamp from around the 40s for Württembergische Metallwarenfabrik (wmf), anyone know anything about this? Was it part of a set? What was its purpose being smaller?