If all else fails and if someone would like to spend 5000 hours, 5 years, and be subjected to a lot of guff, one might try this:
1) compile a database of all known Ingrams by serial number - determine if the SN's are consecutive. I think to have an adequate graph you'd only need 50 or so guns, maybe less.
2) sort them by serial number and see if the addresses on the ribs have a pattern relating to the gun serial numbers.
3) Use the UK Press databases to compile all known press advertisements for Ingram: The addresses in the ads combined with the dates of the newspapers should give a clue as to when he moved shops and give solid data-points for dating the guns: The ads combined with the guns will confirm what he was making at the time and perhaps what patents he was using.
Etc.
Just joking...but if someone gets really interested in one gun maker, the temp-plate is there. It's been done.
Last edited by Argo44; 06/03/22 11:52 PM.
