I had looked quickly in in my Mar 1954 edition and hadn't found the letter designations found by John.
There are a few earlier editions of this 1943 edition on line listed here as well as other New Departure Publications
Catalog Record: New departure hand book | HathiTrust Digital Library
Outstanding! I never thought I'd find a manual, much less one online. Thank you!
While the bearing is stamped ENDEE, I believe
this is a phonetic spelling of the literal "ND" . Page 64 of the manual linked above discusses "ND" bearings of the "8000" type. Pretty amazing coincidence? I think not. The manual goes on to discuss the outer/inner ring width differences. (Another confirmation.)
BOOM! Page 71, about 1/2 way down the page.
88502 - Width - .5669, Seal Width - .493
My calipers/eyes may need some calibration.
I believe this confirms my ENDEE = ND assumption?
Interesting numbering system as well. (I'm a novice in bearings). Per page 119, I believe the numbering is right to left. Therefore, 88502 is
02 - Bore size (Will have to look that up)
5 - non-loading groove light series
88 - ND Seal/shield, both sides
Special note. The Telegraphic codes are a bit of an eye opener for me. I'm a software developer by education/trade/training and have worked with EDI for YEARS. It fascinates me to see how the "state of the time" technology was used in procurement and fulfillment. Assuming that is the intent of the codes found on page 107 ~ 116.
Thanks again for the great resource and education! There's ALWAYS so much more to the, seemingly, simple things,