1911 Luger?

[Doubs]

The breechblock and firing pin have been changed and the grips have been replaced. Considering that the extractor serial number matches the breechblock, I'd say the replacement was as a complete unit. The firing pin is an improvement as it has the flutes for debris to pass through. The original firing pin would have been without flutes.

Your Erfurt is 109 years old and has seen a lot of service. It's not surprising that parts have been replaced. It's just part of the gun's history. As a family heirloom, that will not matter one bit... nor should it. It was your grandfather's gun and that's what's important. Record what you know about it for future generations.