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  #11  
Old 08-18-2019, 11:32 AM
Gewehr43 Gewehr43 is offline
 
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OP...........No worries...………

The discoloration is normal.
".....As DD pointed out, the slides were hardened in some areas and that is what you are seeing.
Since the slide was different hardness in places, the Parkerizing took a different hue or shade in those spots.
Normal...…………."
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  #12  
Old 08-18-2019, 12:38 PM
jwyatt jwyatt is offline
 
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hope this link works https://imgur.com/R9p7EtH

Last edited by jwyatt; 08-20-2019 at 06:21 PM.
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  #13  
Old 08-18-2019, 01:16 PM
DDRode DDRode is offline
 
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Quote:
Originally Posted by DDRode View Post
The hardening of the front end of the slide for a distance of 2-1/4"-2-1/2" to prevent wear & deformation originated on COLT commercial pistols in 1925. This hardened area is usually a darker color. (CLAWSON (3rd Edition) Page 37)

SEE CLAWSON (3rd Edition) Page 42: https://www.dropbox.com/s/1wb4k840n8...20024.jpg?dl=0

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Last edited by DDRode; 08-18-2019 at 01:38 PM.
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  #14  
Old 08-18-2019, 05:43 PM
RHScott RHScott is offline
 
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You need to sell that one. Thinking about it will make you mean and anxious.
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  #15  
Old 08-18-2019, 06:12 PM
DDRode DDRode is offline
 
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Quote:
Originally Posted by SDCoff View Post
Do we know when the spot hardening ended? I rec’d a high serial numbered Colt (July-ish 1945) with a Colt slide that has been spot hardened. Trying to figure out if the slide is possibly original to the frame.

By "spot hardening", I assume you're referring to the flame hardening of the slide stop notch on the slide.

This was implemented by COLT in February, 1943 at about serial #880000. The other contractors followed shortly thereafter.

This practice continued to the end of production in 1945.

As to dating the slide...the rendering of the RAMPANT COLT on the left side of the slide is critical to determining if you've got a NOVEMBER '42, OCTOBER '44, or MARCH '45 variation.


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  #16  
Old 08-19-2019, 06:33 PM
colemanw colemanw is offline
 
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Colt's commercial production right after the war utilized left over usgi spot treated slides. By 1947 or so, newly made commercial slides were fully heat treated.

Last edited by colemanw; 08-21-2019 at 01:18 PM.
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  #17  
Old 08-20-2019, 06:59 AM
bandofM1 bandofM1 is offline
 
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Quote:
Originally Posted by colemanw View Post
Colt's commercial production right after the way utilized left over usgi spot treated slides. By 1947 or so, newly made commercial slides were fully heat treated.
Very true my 1948 colt super 38 had the last WW2 slide. They even made a special Fat Barrel super 38 barrel so it could use a 45 slide and bushing.
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  #18  
Old 08-20-2019, 11:02 AM
weimar_police weimar_police is offline
 
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hmmm, links work fine for me from DD - might be if you have an account?

As an aside, but different thicknesses will make color hardening and such make the metal look different, as in lugers, the sideplate and slide (upper) will look different when blued)

However, the interesting thing is that as time goes on, it sometimes becomes much more apparent and as said above, after a refinish, or two, the color would naturally disappear.

ed
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