1933 Goudey blue backs

Can anyone shed any light on the 1933 Goudeys that have blue backs. Where they a promo item, etc.

Jay

Blue backs? Can you post a picture or a link to an auction? I have seen white background ones that were print errors but not blue print on back. Dan.

King posted this in REA win thread
Goudey blue back

for the sake of brevity, here is Rob's description of it as well as its known provenance...

Extremely rare, unusual and, very likely, unique 1933 Goudey blue ink printed back variation card of #53 Babe Ruth. Goudeys, of course, normally have green print on their reverses, but the print on the reverse of this example is distinctly blue. This is only the second example of a Goudey with blue ink printing on the reverse that we have ever seen. The first confirmed example of 1933 Goudey with blue back printing was an example of card #47 Heinie Manush (interestingly, a very close number to #53 Ruth, perhaps not a coincidence), which was found in a large original-owner 1930s gum-card collection. The Manush blue back Goudey was actually discovered by REA while writing a description of a set of 1933 Goudeys sorted from the collection which appeared as Lot 417 in 2007. (An image of the Manush blue back card can be found in the REA auction archives at: http://www.robertedwardauctions.com/auction/2007/417.html). The #53 Babe Ruth blue back was found by REA in the Charlie Conlon Collection, stored in a vault with Charlie's rarest and most valuable cards (such as the T206 Doyle NY Nat'l, T206 Plank, 1933 Goudey Lajoie, and his R300 George C. Miller complete set). We have no idea where he got it, or how long he had it, but given Charlie's great interest in extreme rarities, it is not surprising that he would appreciate, and make a point to keep such an unusual and extremely rare variation card, especially from such a popular set as 1933 Goudey. The card, which has been encapsulated Authentic by SGC, appears to have possibly been sheet-cut. It is very clean, with bold colors, a crisp, perfectly focused image, and centering slightly to the bottom (approximately 70/30 T/B); its few isolated minor stains do not significantly detract from the card's overall superb eye-appeal. The light horizontal stain coming from the right edge appears to possibly be the result of a paper clip. (If so, this might be evidence that the card long ago originated from the files of Goudey, though this is speculation.) This is a fascinating card and the only Goudey blue ink printed back variation card of Babe Ruth known to exist. From the Charlie Conlon Collection.

That is so cool! I completely missed that!! IDIOT I am! I am sure I would have lost but I would have liked to have been in the thick of that lot. I have never seen anything like that before, it makes me wonder unless a full sheet got out with the wrong ink color. Dan.

I have personally seen more than two. Not sure what the story is on these.

Are any available Kevin? If so, please pass along my email address r337man@yahoo.com thanks Dan.