Hello Ekimp, I thought my piece was acid etched but looking at it with a magnifying glass and running my nail over it I just don't know. It has a very slight lip to the edge so it may well have been applied, perhaps using a stencil, but it is very fine. That is the decanter I saw, the main part of the design is the same and it does appear to be some sort of enameling? I haven't researched mine fully yet, perhaps there's something online detailing W&C production techniques.