The date code letters were thus 1975 - A; 1976 - B; 1977 - C; 1978 - D; 1979 - E; 1980 - F.
Quite apart from such dating information as we have been able to provide on many of the individual rifle types included on this website, there are other ways in which you may be able to confirm the date of manufacture, or at least the date of proof, of your rifle.
Do remember, though, that date information coded with proof and Proof-House inspection, viewing or identification marks, does not necessarily coincide with the date of manufacture. have, for many years, been legally required to carry proof marks from one or other of the Proof Houses.
"The Broad Arrow", and "The Lee-Enfield Story by Ian Skennerton, afford many specifics of manufacturers' and unit codes and proof marks, and of rifles of Enfield origin respectively. Akin to the longstanding hallmarking system for British silverware, in which letter codes relate to years of manufacture or importation, is an equivalent employed by the British Proof Houses.
The problem here is that, unlike silver hallmarking, the Proof House codes were only introduced in 1921 and have been only intermittently applied since then, almost on the whim of the Proof Master incumbent at any particular time. production was proved at Birmingham and the marks should therefore comply with these series.
Many, but not all, of our pages carry date information on the various rifles illustrated or discussed, where it has been possible to be sure of data.