Quote:
Originally Posted by FZS1000
I took your agvice and cafefully removed the back, the mark B&S stands for B H Britton & Sons who I have found out made cases for Rolex, the marks are for Birmingham 1971 which ties in with the watch being purchased new in 1973
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That's good extra information about the case maker and hallmarks. Unfortunately you can't just lift the movement out of the B&S cases so you'll have to get a watchmaker to remove the winding stem and take it out so you can see the dial dust or marks more clearly.
This is probably in need of a service anyway so a good independent watchmaker could give you some help on costs, work required etc.
The B&S cases are very well made so you have got a nice example of a 9 ct UK cased Rolex Precision watch, well worth cleaning and servicing when the time is right.
There are some numbers scribed into the back of one of the case lugs and these might be related to whenever the watch was last serviced. Most watchmakers scratch the date of service and their initials or company ID in the case back but maybe someone put that information on the case lug instead. It's worth another look to see if that is useful information.