During WWII , Qualifying Army personnel were issued time pieces under the “ORD DEPT”
ordnance watch series produced by the major watch manufacturers. These ORD.DEPT
watches used a unique usa part number prefixes that were letters such as OC, OD, OF.
These indicated the type of movement, and in some, the type of timepiece..
Ordnance Department Markings
In 1940, the Ordnance Department published the requirements for military watches.
The list includes pocket, wrist, and stop watches. Note also, that there was a
provision for watches produced before 1940 to be retroactively marked if they were serviced
Below are numeral part numbers indicating the
grade, jewels, manufactuer time, quantity and service
From – To
|987A||17||1942?||BuAero US Navy|
Hamilton Post WWII
|OF 747||747||17||1946?||No hack||USMC|
|Type 1||684||17||1970||Hack||USAF, RAAF|