Greg, hopefully you subscribe to the Old Cardboard Magazine - if you don't, I highly recommend this pub. In the Fall 2011 Issue #26 of OC, you will find Rhett's comprehensive and very informative article re the E121 and related sets, in which there are pictures of the 3 different backs of the 1921 Standard Biscuit cards (D350-3); I frequently refer to Rhett's masterpiece as I work on my type-card collection.
Val
|