C-man, seems to me how good your 1930 gun is might depend on how well Atkin was able to rebuild its work force after 1918. Or, if they didn't have sufficient skilled workers in house, whether they would have gone to "the trade" to fill any holes they might have had among their own workers. The British gun trade, in general, was certainly in better shape in 1905 than in 1930 (when there was also the Depression with which to contend). But you will have a gun that was built under more modern rules of proof. Post-WWII was even worse, for a lot of reasons. The British economy was quite slow to recover, for one thing.
But it seems to me an Atkin made in 1930 wouldn't have had any less handwork than one made in 1905. So much would depend on the skills of the individual workers involved, in both cases.
