It’s may be slightly tangential, but here’s a drawing for the Vickers 40mm Pom-Pom belt-filler. My apologies for the quality but it was a fold-out drawing from the Admiralty Handbook and the National Archives at Kew have strict regulations about handling documents … making it impossible to render most of them properly flat.
The full title of the document is “Handbook for the Vickers 40mm Automatic Gun Ordnance Q.F 2.pdr. pom-pom Mk II*” and the document reference is ADM 186/262.
Happy New Year !