Two Ind Coope Double Diamond ashtrays bought off the same car boot on the same day but from different sellers. The dark one is probably made of Bakelite but has no makers name on, c1950's for £1. The pottery one has the makers mark of Empire Porcelain Ltd Staffordshire, England and another mark that is I think '12-60' - is this December 1960? I've no idea but it probably dates to that time so it might be a date stamp. At 75p I had to have it. Today (5/2/2017) I've seen this ashtray/change tray for £20! Can it really be worth that?