Ted---you may be erudite and all, but William Hayes says dinosaurs never really existed
Great info. I finished the 48 and 49 Bowman sets just last year, including the variations you mention. I was born in 1950 and did not start collecting until 1957, and so grew up with Topps and finished out those sets before starting on Bowmans.
Have you seen George Vrechek's recent two part article in SCD on the print process for the 53 Topps sets ? It has several mysteries similar to those of the 49 Bowman set