I don't get it. Is it from a heat source applied to the metal? Or a chemical interaction.... oxidation of the silver or copper or both? This one stood out from around 50 others after a clean and I cant say I remember another
Yep...did that to. All the others are super shiny and clean. They were all a bit dirty to start with but not disgusting. I gave it a red hot crack with the baking soda until I realised it was unusual. Around the neck and under the chin are a lovely purple colour...pic does not do it justice