In reply to William I never thought that by Wayne Hanley
I suspect that this model is the "Tildon," as although the dial looks "Military," the case looks dressier, to me?! (And I doubt a "Regulator" would be anything BUT a more subdued, military inspired timepiece???)
Also, I meant to say "American Clipper "B" (from memory) vs. "Aviator..." And as I stated several times here... I have yet to SEE a positively ID'd "Aviator" design... although there are many incorrect IDs online, and (2+) noted Aviator models! (Or: G-S, BB, etc. didn't have specific model names, over 2- 3 decades, which isn't very likely?!?)
Best :-) Scott
p.s.
MODEL: G-S SUC BB PF
50s: Aviator CMT198-10 RMU103-15 CMT2247 203 HMB225/1
40s: Aviator CMT293 MU103-15, RMU98 CMT2205 198 HMB220/3 198