S/42 luger family heirloom

[Cabledog]

Originally Posted by ithacaartist

Welcome, Sean, Your S/42 was made in the latter half of 1937, the year which Mauser changed from rust bluing to hot salt bluing. Its frame was made by Mauser and not DWM stock moved from Berlin to be used up first, evidenced by the "Mauser hump," the swelling on the top portion of the back ends of the barrel extension. It looks like an honest war-horse to me. Enjoy your family heirloom!

Wow! Thanks for the info. Is there a way to tell the difference between the two bluing processes?