vintage Legion mark silver plate, chalice cup or trophy bowl worn tarnished patina

Very worn finish on this old Legion silver cup or trophy bowl. It measures 5" across the bowl, stands about 4 1/4" tall. It's not engraved at all that I could see, I expect it originally sat on a base which would have been marked.

I'm not certain as to the age of this piece - the hallmark looks mid 20th century to me. Lovely wear and dark patina on this one!