Morrisman, unlikely as the US had mass production at the Springfield Armouryhttps://en.m.wikipedia.org/wiki/Springfield_Armory though I suppose it might have been pre-mass production.
Dan, BAE learnt the bespoke nature of Sir Frederick' s finest when they won the contract to convert the Victor 2 to the tanker role. They took the first wing off and used it as a template to create 24 ship sets. When the first of these was offered to the second aircraft it didn't fit.
The original build had had just four master bolts with the rest drilled using semi-skilled Labour.