Having spoken to a lot of Birmingham gunmakers - nobody has any folk memory of who made guns/parts/barreled actions for Harkom pre-WW2, or pre-WW1 if I think about it.

It appears that the better Scottish gunmakers had their own men and did the vast majority of the work themselves.

After WW1 more and more began to buy in part or fully completed guns from AA Brown (whom made Dickson boxlocks), Webley and the other Birmingham wholesalers.

www.vintageguns.co.uk