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1906 and 06 proof marks
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Santa Clara, CA
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September 14, 2022 - 10:10 pm
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proof-3-001.JPGImage EnlargerAny explanation why the bluing on the 1906 proof marks seens to come off?  RDB

06-proof-mark-001.JPGImage Enlarger

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September 15, 2022 - 1:06 am
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Roger,

It was not just the Model 1906/06 that the bluing came off when the proof marks was struck.  All Winchester Models manufactured from the Teens through the early 1930s experienced the same issue.  It is one of the many visual clues that I use to identify an “original” finish on a Winchester.  When you find them with 100% bluing coverage surrounding and on the proof mark stamp, the odds are extremely high that it has been refinished.

What is the serial number on both of those Model 06 rifles?

Bert

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September 15, 2022 - 1:39 am
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Serial numbers are: 837315 & 846774.  I believe you have them in your list. RDB

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September 15, 2022 - 10:47 am
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“Any explanation why the bluing on the 1906 proof marks seems to come off?”

When the PW proof mark die is struck into the metal it forms a plastic deformation, meaning the metal is displaced and doesn’t return to how it was before. If you examine a Winchester proof mark under high magnification you will see that the little tiny waves of metal radiate out around the impression itself for some small distance say 1/16″ plus or minus. This is similar to a rock dropped into water. There is the big splash hole at the center but little waves radiate out around it. Winchester gun metal has plastic qualities too and acts the same only on smaller scale.

Since the metal surface is deformed the thin layer of metal turned blue on it is deformed as well and a halo of white metal is formed in and around the proof mark. The exact molecular process of why the blue turns white and goes away is over my pay grade. But it happens because the metal was deformed.  

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September 15, 2022 - 2:55 pm
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Thanks for the clarity on the blue loss at the proof mark.  One other question, I have seen muzzles in the white, as referenced in the Schwing Book, and I have seen “blued muzzles” on what appeared to be original finished rifles.  When they started using the “Du Lite” finish was the muzzle still covered during bluing and left in the white? Or was it left uncovered and blued?   RDB

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September 16, 2022 - 12:45 am
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To the best of my knowledge, the muzzle face was blued when DuLite bluing was used.

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