W575-1 and E121. Not the same.......
 

Gotta love PSA. Definitely a 1921 E121-80 in my opinion. Maybe they need to get a baseball card encyclopedia with pictures in it.?

And this is who we rely on to grade our cards accurately!?! ;)

Simple mistake as they missed the whole back thing, it is also a pet peeve of mine that they automatically slab all w575-1 as "hand cut" whether that is the case or not.

Seller doesn't appear to care. Assuming the card is not trimmed, it would fetch a numeric grade if properly identified,and almost certainly bring more money.

Then again maybe it is a E121-80 back with a W575-1 front
 

I personally believe this to be a W575-1 card that has had an E121-80 back erroneously applied, which of course makes it incredibly rare and extremely desirable.

Brian