I have amended in my initial post here, regarding the date of the printing of the A-B-C-D cards from April 1910 > June 1910.
I realized that my initial recollection was mistaken when I dug up my records.
However, my story stays the same, and the timeline for the printing of the T213-1 COUPON cards has shifted to June 1910.
Sorry about this, the 20" of snow and a recent layer of ice here in Pennsy must be affecting me
TED Z