Goodyear E-70-15 GT WIDE TRACK NOS

[PapaSmurf]

Foster
Based on my research done on the web page below, I have come to the following conclusion for the tire with a DOT code
CYUYB3EX1260 as shown on your tire.
a) CY indicates the tire was manufactured by the McCreary Tire & Rubber Company in Pennsylvania. Did they ever manufacture Goodyear reproduction tires?
b) UY indicates the size which translates to a 245/75-16 Cooper or if it is OY it would be a 245/60-16 Goodyear. Neither of these possible codes correlate with the size E70-15.
c) B3EX is a code for the particular tire as determined by the manufacturer.
d) 1260 indicates a date code; they were 3 digits (the first 2 digits indicate the week & the last 1 the year) before 2000 & 4 digits afterward. I'm at a loss to what this 4 digit code means since only 01 through 15 should have been used to indicate manufacture years 2001 through 2015. It actually might be 126 which would mean the 12th week of 1966, 1976, 1986, or 1996.
Are you as confused as I am? The bottom lime seems to indicate that the tire is not the original spare. IMHO
I also wonder why I obsess about such a topic?

http://www.barrystiretech.com/dotcoding.html