When i saw this i thought that it was aTrench Art item but it is engraved on the inside Hedges & Butler 155 Regent St. so i would assume that it is an item that was used in the Club back in the day, the inside of the curved back plate was Silver plated but no trace that i can see of plating on the outside, it looks as if something would have been placed in it and gripped by the curved sides but the inside was meant to be seen, as a Club item it is a scarce thing but for the life of me i can't work it out, any suggestions would be welcome, the Diameter of the Base is 2 1/2 Inches and it's height is 2 3/4 Inches, please see Photo's. Just Googly apped it and it appears to be a Bottle Coaster possibly used to display a Bottle, there you go!, a rare item of the old Wine dealers Club.