Originally Posted by
Ed875
As far as I'm aware none of the Fatboy Navigators carried a service prefix to the NSN; I have examples from 80 and 82 and both just have the NSN, S/N and date.
Only fatboys to carry the Royal Navy 0552 code were the the last two or three hundred standard CWC G10's manufactured under the 1982 contract.
Not aware of any further Navigators being manufactured until 1994, where a very small number of new CWC G10's were converted by the manufacture but they had the RM 0555 prefix. A few more but total new build were supplied in 96 but again without a service prefix and the final ones were sent in 1997 but with the RM code making a reappearance; the 90's supply probably numbered no more than 200.
Either way, the CWC Fat Case Navigators are rather rarer than original Rolex MilSubs.
In 1999 the tri-service Pulsar G10 entered service and the requirement for a separate watch with a date function effectively disappeared, although in 2007 a very very small contract for 200/300 Pulsars was placed, possibly by the RN and it could be suggested they were for navigation use (usual contracts were in the thousands).
Ed