CWC lost the contract for the replacement of the "Fab Four" chronographs to the Seiko Gen 1 in the early 1980s. When the contract went out for what became the Seiko Gen 2 in the early 1990s, it is likely that CWC tried again with this watch (it has the same NSN as the Sekio Gen 2, ending in 814-9181). It was never supplied to the British Military in quantity, although at least one has appeared as an apparently RN-issued watch. Some were sold as civilian watches, and about 350 were supplied to the Bangladesh Air Force, marked BAF.
The BAF chronographs were issued by the Bangladesh Air Force in three batches - the first in the late 1990s and then again in 2000 and 2004. The batch sizes were probably 150 watches, 100 watches and 100 watches, based on observed issue numbers.
They were specified on jangly Rowi bracelets, probably comprising 13 or 14 links when new, but often found now much shortened or with the bracelet missing entirely. The bracelets are folded around the fixed bars of the watch, and have a diver's safety clasp and a bracelet extension link for wearing over a wetsuit (ironically for an airforce watch!).
The movement features an hour hand that can be adjusted independently of the minutes in one hour increments, a date at the 4 o'clock position, running seconds at 6 o'clock, central chronograph seconds, a 30 minute chronograph counter at 10 o'clock, and a jumping 1/10th of a second counter at 2 o'clock - which slightly confusingly doesn't move when the chronograph is running, but then jumps to the 1/10th measurement when the chronograph is stopped.
These watches can sometimes be found at Bangladesh government auctions with Salvage papers, based on the RAF form 3910C.