Internet Horology Club 185
999P Hour wheel and hands

This topic can be found at:
https://ihc185.infopop.cc/eve/forums/a/tpc/f/2121060351/m/8283959297

July 25, 2019, 09:07
Dennis Gunning
999P Hour wheel and hands
I have Hamilton-Ball 999P-B647947 1938

Does this use 992B parts, hour wheel and hands??


Thanking you for your help!
July 25, 2019, 09:14
Dennis Gunning
I also have Ball B637304 serial number indicating a production date of 1930. Does it also use 992B Hamilton hour wheel and hands??
October 28, 2019, 15:50
Lindell V. Riddle

Hello Dennis,

Knowing I am a bit late to the dance, the parts you were asking about on both your watches are the same as those for a Hamilton 992-Elinvar of the same era. When they engineered the entirely new in 1940 Hamilton 992B their claim and the reality was that nothing interchanged from earlier "Pre-B" models. So always remember the "Pre-B" and "B" separation line when seeking any movement parts or hardware as the movements are entirely different. Even the "hole-sizes" in the hands are different, there is no interchangeability.

Hope this is of help to you and others,

Lindell

Wink