To me it appears to be over polishing to remove a device:


note on the inside of the 'Y' there looks like an incuse mark there. The bottom of the y looks like a strong polishing was done on that area of the field. This would leave a raised area on the coin.


note on the inside of the 'Y' there looks like an incuse mark there. The bottom of the y looks like a strong polishing was done on that area of the field. This would leave a raised area on the coin.




















