Identifying box?

My husband picked up a Hillcrest Country Club Los Angeles. I think it’s cigarette box c1941. Not sure if it’s silver, silver plate or something else? Only Mark is found on underside and hard to distinguish.image image

The box is silver plate but is probably older than the engraving; the crest may have been added when the engraving was done.

The mark is one used by W&G Sissons & Co and their predecessor companies in Sheffield, UK. See here for further information. This tends to suggest that the box is from the 19th century.

Phil

Thank you for your expertise! Much appreciated. I would have been lost without your help.