1969 card mismatch front and back. Rare?

IwantNonCCs

Coin guy, going through old baseball cards

Came across a card with Dave Adlesh on front, but back is 396 Jim Campanis back.
Assume it's just a courisity printing error, sheet fed upside down.

Google search didn't pop up with anything
Are these scarce? Any value?

Thanks
David

JoeBanzai

Many of these out there. 1974 was a big year for "wrongbacks"

PSA refuses to grade them as variations even though a simple print imperfection on the front of a card can garner one!?!?!?!?!?