Help needed with which i think is a plate mark.Thanks

[s1ider]

Hi all, a little help needed with this plate mark. Im guessing its a plate mark as theres no purity stamp. Had a little look around but cant find no info. I find plate marks harder to find which i guess is understandable. Comes from quite a large spoon. Thanks

[s1ider]

sorry forgot photo.

[s1ider]

i know its kind of off the subject of this post but dont know if im allowed or if i am where i can post a question about silver. Im quite new to silver and was hoping someone could advise on some of the best British silversmiths. Thanks. Sorry admin if i wasnt supposed to post this. Wasnt sure as it was about silver makers.