My favourite issues at present are the Soho Mint coppers. I've just picked up this nice grade 1806 penny to add to my collection (EF at a guess ?). On the edge milling I noticed the grooves aren't uniform all the way round, a few are either thicker or very faint compare to the rest of the coin. As there is very little wear to the coin does anyone know if this is common for this type and period ? I've checked the size and weight which are both spot on so to my untrained eye I've no reason to suspect it as being a fake. Thanks