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The adapter, of steel, is flanged and screw-threaded externally to suit the cartridge case, bored out centrally, recessed and screw-threaded to receive the Primer, percussion, Q.F. cartridge No. 12. Three recesses are formed in the base to take a key to facilitate and removal of the adapter.
Source: Amdt 1. Sept, 1942. Handbook O.Q.F. 40-mm., Mark I. I* & III. 1941
...It is used when cases other than Marks 3 and 4 are employed.
Source: Maintenance manual for the O.Q.F. 40-MM., Marks I* & 1/2. 1946
The case was made by D.F. Taylor of Tipton, Staffs. - D.F.T.
W.E.L. repaired the case, (the rectangle signifies a repair station). I don't know who they are, but I'm guessing at Weston (Engineers) Ltd of Colne, Lancs
Hi Falcon, "WLE" appears to be a repair or refitting contractor mark as it is in a rectangle. I think the case manufacturer is "DFT" - D.F. Tayler & Co. Ltd (Tayler is the correct spelling) of Birmingham, the pin manufacturers. I also have a 40mm case with the No. 12 primer adapter fitted, which are very rare. (My case is Canadian - "AG/C" Aluminium Goods Co.) The Primer adapter on mine is brass, as yours appears to be, not steel as indicated in the documentation quoted by Quatermass. These adapters were first fitted to Mk 1* modified cases (Mk 1 cases modified to take the adapter). Mk II cases were the same as Mk 1* cases but of new manufacture and could take either the adapter and small No. 12 primer or the large No. 18 primer. Elsewhere in another post Quatermass has listed the Mark differences between the Bofors cases (quoted out of a handbook) but this omits the Mk 5 Canadian variation, which was of new manufacture and designed to accept the American (M25 Bofors) press-in type primer.
Cheers, Graeme
From what I can ascertain this was from a contract (C/R 12046 26th November 1941) for 1,000,000. Cost per 100 - 17 15s 0d and 8 15s 0d for the 300,000 made from “free issue blanks”. Taylers were a small operation, almost in the centre of Birmingham – New Hall Works, which backed onto the canal. I doubt they had the room to make Bofors cases there and probably opened a satellite factory in Tipton, a safe distance from the city.
Other than the railway companies the only other contracts for reforming 40mm cases was Willey & Co. (Engineers) Ltd of Exeter. Their main business was the manufacture of coin operated gas meters. Their listed monogram is “W. EX”. However, they also had a factory in Leicester. It might be that that WLE (more probably WEL) is a play on that.
It appears that during WWII the Exeter factory was involved in a wide range of engineering from parachute containers through to steel floatation tanks for Mulberry harbours.
TimG
P.S.
The adaptor –
JRS - J. Rawsons & Sons Ltd of Tunbridge Wells, Kent – Automobile engineers
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