1956 Mantle White/Gray Back
 

I would like to know the difference between the white and gray back.
I have noticed that many of the cards for sale on ebay are marked by PSA as "White Back" and "Gray Back".
I have one that is not marked as either by PSA.
Below is my card.

Thanks

You've got the WB
 

It was probably slabbed before PSA began noting the two varieties. There is anecdotal evidence that WBs from #101-180 are somewhat scarcer than GBs, but most collectors won't pay a premium for them.

thanks Bob.....Ive never seen how they stack up regarding white or gray.
still wondering how you can tell what color.

Mike

Mike
 

Yours is white. Here are the two for comparison (no longer mine, sadly):
http://photos.imageevent.com/imoverh.../56tobb033.jpg
http://photos.imageevent.com/imoverh.../56tobb031.jpg
Edited to add: It's very easy to tell when you have a stack of them. IMO, some whitebacks can look a little dingy, but gray backs never look close to white.

The white backs are tougher than the gray backs, but if I remember the ones I used to have correctly, the gray backed ones seemed to have slightly better color to them.