Help re SP cartouche

[Harry aka Cowboy]

I have a similar cartouche on a S-HB stock and handguard combo that look new on a similar barely used Inland 290XXX that I picked up 17 years ago off a kid who said it was his grandfathers from ww 2. The only non-inland parts are the rear sight which was loose and the stock set. see pics below. the barrel on this carbine gages less then one on TE and muzzle is virtually new its dated 5-43. Not sure if this helps but the cartouche sure looks similar.