Waterproof Case measures 42mm lug to lug x 34.5mm non inclusive of the Crown using Calipers. Oversized Crown. An anti-magnetic shield appears between the Caseback and Movement. Stainless Steel Caseback screws on and is stamped as shown. rare bird. Military style Star Case. 23 Jewel Chronometer. Hackset for synchronization.Sets and ticks, will not wind - visible damage to the ratchet wheel.
In reply to What does the R at the end of by William Smith
and the H?
In reply to and the H? by mybulova_admin
Hack would get My vote.
In reply to Hack would get My vote. by FifthAvenueRes…
I've seen H assigned as the letter designation for Hack. I was kinda hoping the R may be for railroad approved or some such pipe dream....
Current theory is that the "R" was indeed intended to represent Rail/Railroad. There are a fair number of pointers to this being its designated nomenclature. Its lack of becoming official as such, however, is the basis of a few different theories, all with varying degrees of support.
Update model ID to 1960 Bulova Train Timer "B".
