The British military switched to quartz chronographs with the Seiko Gen 1 in 1984; CWC competed for the contract with a new mechanical chronograph based on the Valjoux 7765, but lost out to Seiko.
According to CWC, some of these watches were issued to the Fleet Air Arm, potentially as a direct purchase from CWC.
Most of the watches seen now are those made in the 90s for the civilian market, for instance here. However, there are some watches that appear to be from the 80s, and which share a similar case, handset and NSN markings to the last issued 7733s. Although they do not have a Service code, issue number or broad arrow marking, it is tempting to think that those could have been in the small number used by the Fleet Air Arm.
The BBC also used these watches, and those also share the 80s-style case, hands and NSN.