I can not find the acid etched mark. The item "EDINBURGH CRYSTAL THISTLE VINTAGE 8½ CORDIAL DECANTER (Ref3670)" is in sale since Saturday, February 2, 2019. This item is in the category "Pottery, Porcelain & Glass\Glass\Crystal/ Cut Glass\Edinburgh Crystal".
The seller is "toby0711" and is located in Sidmouth. This item can be shipped worldwide.