The tops of the devices are showing circulation flattening. If it were a doubled die, the devices would be enlarged. They are normal sized.
On a doubled die, you will see the outer loops of the '8s' affected:


Your are looking in the centers for the spread, but there was no spread, just a bit of collapsing because the zinc is soft and the devices are a lower profile. But now, you can add this spread on the outer edges of the '8' in your search for a DDO that year. (Also the tail of the '9' as well)
On a doubled die, you will see the outer loops of the '8s' affected:


Your are looking in the centers for the spread, but there was no spread, just a bit of collapsing because the zinc is soft and the devices are a lower profile. But now, you can add this spread on the outer edges of the '8' in your search for a DDO that year. (Also the tail of the '9' as well)
Edited by coop
11/26/2020 7:19 pm
11/26/2020 7:19 pm























