It'd be interesting to see a photo, Louie.
John Bumford 2, From Blackmore's "Gunmakers of London";
John, Son of John 1,
Apprenticed to Thomas Hardwell, 1735; Free of Gunmakers Co and proof piece 1742.
Elected assistant 1746; Master, 1741, 1756.
Gunmaker at the sign of the cross blunderbusses, Minories (London) 1754 -49. Minories 1759 -68;
8 George Street, Minories 1769-74.
Contractor to Ordnance, 1756 -71; East India Company , 1745 -73; Hudson's Bay Co,1757 -75.
Died and will Pr 1775.
Hope this helps!
Was Gunmaker, rather than barrel maker.
Best,
R.