"...been for tanks - or dual purpose"
Tony,
I have not got far with this. I have a note that records an entry in the 1920 OB Annual Report (page 185) giving the 2-Pr Mk V as Land Service but that probably does not mean much. Incidently the 1921 AR (page 46) mentions the conversion of 2-Pr QF Mk IV to sub-cal (possibly for the 3-in 20cwt).
Another note suggests that OB Proc 40809 lists obsolete guns (Naval Service) which might touch on these small calibre guns; I will check when I can (there are sets of OB Procs in the PRO and in the Royal Armouries Library for anyone so interested).
Tony,
I have not got far with this. I have a note that records an entry in the 1920 OB Annual Report (page 185) giving the 2-Pr Mk V as Land Service but that probably does not mean much. Incidently the 1921 AR (page 46) mentions the conversion of 2-Pr QF Mk IV to sub-cal (possibly for the 3-in 20cwt).
Another note suggests that OB Proc 40809 lists obsolete guns (Naval Service) which might touch on these small calibre guns; I will check when I can (there are sets of OB Procs in the PRO and in the Royal Armouries Library for anyone so interested).