Hi,
203mm x 100mm WITH the date of 6/16/60 is the REPRINT, sadly.
Yes, the publisher made it a bit confusing by not putting reprint somewhere on there. I expect that before Krumhansl was published and there was a standard of size set, it would have been really easy to buy the $35 one and pay $1000 for it... Add to the ones that were glued into copies of Dorbin, the ones that were overrons and have no glue on the back. Those could easily be passed off as originals.
So, the eternal answer is "Yes, size DOES matter."
Bill