After mid- '37 the extractor was no longer strawed on Mauser guns. I have noticed that many/ most extractors appear "different" in finish post-'37. My '40 and '41 Mausers have a slightly different hue as do many of the Simpson LTD Mausers. So that is my baseline of information but then I bought this S/42 1938 that has a consistent tone as the receiver and frame. I assume this gun is orig and right and the extractor color is just variable??
S/42 1938 below