S/42 1937 opinion needed

[alvin]

John, I read your opinion. Basicly, the crown had been blued but got lost after firing the gun.

I will post two muzzles here.... both have like-new bore. I assume they had been fired in the past, but the bore looks newer than my SIG 239, which I bought NIB and fired only 21 rounds. So not much firing.

May I assume the blue was lost due to past firing, .....no, I am not convinced.

7,65 Lu
9m/m Box