Before I continue, below are links showing hundreds of examples of forged Mickey Mantle baseballs, photos, etc. found on Ebay (the most dangerous place to buy autographs if you're a casual collector or impulse buyer).

https://live.autographmagazine.com/forum/topics/ebay-mantle-dimaggi...

https://live.autographmagazine.com/forum/topics/examples-of-mickey-...

https://live.autographmagazine.com/forum/topics/most-common-mantle-...

Let's check out the below listings from Ebay seller Tss_photography.

Forged Mickey Mantle and Joe DiMaggio baseball.

https://www.ebay.com/itm/145140859088?hash=item21cb11c0d0:g:EGcAAOS...

Forged 500 Homerun Club baseball.  Ugly forgeries.

https://www.ebay.com/itm/145140859109?hash=item21cb11c0e5:g:8VUAAOS...

https://www.ebay.com/itm/145140859104?hash=item21cb11c0e0:g:LX0AAOS...

https://www.ebay.com/itm/145140859095?hash=item21cb11c0d7:g:~-oAAOS...