What is this unusual Rusty Staub card?
 

Just received this in a group of vintage cards. It's not a normal deckle edge. Smaller and the signature is black instead of blue. Back is blank with no card number. Been searching, but not finding. Anyone know?

[IMG]https://live.staticflickr.com/65535/...060f2f8d_k.jpgIMG_6449 by Philip Golden, on Flickr[/IMG]
[IMG]https://live.staticflickr.com/65535/...7e482f78_k.jpgIMG_6450 by Philip Golden, on Flickr[/IMG]

O Pee Chee version.

https://www.comc.com/Cards,sr,i100,=...+-+Deckle+Edge

https://img.comc.com/i/Baseball/1969...&size=original
1969 O-Pee-Chee - Deckle Edge #_RUST - Rusty Staub [Good to VG‑EX]
Courtesy of COMC.com

thank you!