The green spots found on some copper coins are called verdigris this is a copper salt like rust. It is usually copper acetate, but can be a copper hydroxide. Neither of these would come off with any kind of...
Confused or unsure about purchasing coins of this era on ebay ? I hope my guide will provide some answers to your questions. This guide is intended to be of help when considering which Saxon and/or Norman...
On visiting coin fairs and dealers' shops in the UK these days you will usually find at least a smattering of coins for sale which are held in officially authenticated plastic holders. The same is true of...