Coasters - Anything interesting?

[TD-Sierra]

I'm so glad to have found this forum, as I have a variety of silver pieces to deal with following the passing of my mother. This is a group of 12 coasters, about 3" diameter, in three patterns. I assume they are silver plate and the mark on the back is M.S.P. Co. 25 (and another digit that differs with each pattern). The coasters are well used, so I suspect they belonged to my grandmother (~1920-1940?). Can you identify the "MSP Co" mark - and is there anything unique or interesting about these that the family should be aware of?
Thanks so much for any help you can give. (Hopefully the photo attachment will work.)

[dognose]

Hi TD-Sierra,

Welcome to the Forum.

Please post a close-up of the marks.

Trev.

[TD-Sierra]

Here you go.