Not seeing a doubled die. Looks like DDD and split copper plating.
Here is a link on types of doubling,click on thumbnails to enlarge:https://koinpro.tripod.com/Articles...Doubling.htm
John1
Here is a link on types of doubling,click on thumbnails to enlarge:https://koinpro.tripod.com/Articles...Doubling.htm
John1

























