Being based on this side of the pond I have no direct knowledge of 'ehat happened', but from what I have picked up over the years it appears that the US importers had two methods of 'marking' their firearms :
1) They would employ 'local' UKlabour to mark them up - no doubt they were issued with 'stamps' and told to get on with it. I doubt that the 'educational level' of a 'metal stamping person' would allow them to know that a Longbranch was made in Canada
, A Savage in the USA
, a Lithgow in Australia
..........
2) The firearms arrived in the US and put into 'bonded stores' - the US Importers would then employ local labour, issued with 'stamps' and told to get on with it. I doubt that the 'educational level' of a 'metal stamping person' would allow them to know that a Longbranch was made in Canada, A Savage in the USA, a Lithgow in Australia ..........
In all probability the 'Supervisor' was employed at 'minium pay rates' and had no more knowledge than the 'stampers'