FWIW, the hinged bands were only used on very early 1941 LB's. they are VERY uncommon.

The LB with the restamped serial number looks like a typical Indian refurbed No.4 to me. Or possibly Pakistani... but you get the idea.

Bead blasted and blued will somewhat emulate post-war parkerizing, powder blasting and blueing would be a close match to wartime LB factory finish.