Frame marking:

[Linked Image from i.ibb.co]

If I had to guess, initially the stuff came from WR, with plans for great sales, at which point, H&R would have started sourcing the stuff, except the barrels, locally. The great sales part didn’t really pan out, sadly.

I’ve heard less than 2000 guns were made, in all grades, so I doubt any raw materials were procured locally.

Happy to be proven wrong, if somebody else knows different.

Best,
Ted