1960 Bulova Aeronaut
24-hour watch
All stainless case dated M0, same as the Train Timer; USA movement, 21-jewels, hacking 10CNCH dated M0; full 24-hr dial with a shaded area for the 6pm to 6am hours, re-lumed, uses a special hour wheel to allow for the 24 hour vs. 12 on the normal movement; 19mm lug width, link expansion band added.
In addition to the caseback gasket, there is a gasket under the crystal, and a rather large one in the oversized crown tube.
linebook excerpt from 1963
There was also a yellow gold 23-jewel version called the Mercury
In reply to Now that's cool. Any photos… by mybulova_admin
Not much different under the dial, just an hour wheel with more teeth, posted here.
In reply to Wow, that's a fine looking… by Geoff Baker