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S&W Revolvers: 1980 to the Present All NON-PINNED Barrels, the L-Frames, and the New Era Revolvers


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  #1  
Old 09-14-2020, 08:06 PM
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Default 640 no dash mfg date and ?

I have a nice .38 only 640 no dash. Sn# BKR53**. Wondering when it was made and if it was part of a LE batch.
With that, I can not find any MIM parts in it so I suppose “pre MIM”? Was the barrel a forging and conventional rifling or the ESP rifling like current production?
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Old 09-14-2020, 09:04 PM
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As far as I know, the 640ND is pre-MIM. Check the back of the trigger. If it's solid, it's forged. If there's a groove, it's MIM.

It should have a conventionally rifled bore.

Can't help with your other questions. Hopefully, someone will be along to answer those.
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Old 09-14-2020, 09:07 PM
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Trigger is a milled flash chromed one. Tight lockup, better than my 442.
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Old 09-14-2020, 09:34 PM
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640NDs are nice. It's been my "grail" gun for several years. Came close to getting one a few times, but they always slip from my grasp. Someday I'll get one.

P.S.: Gun photos are always appreciated.
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Old 09-14-2020, 09:37 PM
robertrwalsh robertrwalsh is online now
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Can't find BKR on the list but I am guessing 91 or 92.
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Old 09-14-2020, 09:58 PM
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Default 640 no dash mfg date and ?

I have a model with CEN000xx indicating one of the first 50 to roll off the line in ‘89 ......+P+ ammo rated. Among my favorites.


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Old 09-15-2020, 02:23 PM
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Quote:
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I have a model with CEN000xx indicating one of the first 50 to roll off the line in ‘89 ......+P+ ammo rated. Among my favorites.


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I also have a CEN# gun but with a higher #. How many were made with the CEN prefix
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Old 09-15-2020, 06:04 PM
kbm6893 kbm6893 is offline
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Quote:
Originally Posted by Scottrh2 View Post
I have a nice .38 only 640 no dash. Sn# BKR53**. Wondering when it was made and if it was part of a LE batch.
With that, I can not find any MIM parts in it so I suppose “pre MIM”? Was the barrel a forging and conventional rifling or the ESP rifling like current production?
My 640 is BRB4446 and it was made in 1993
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Old 09-15-2020, 07:04 PM
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I also have a CEN# gun but with a higher #. How many were made with the CEN prefix
Never been able to determine - there are threads on here that reference into the thousand area, fron memory.

Yours should be marked +P+ ammo.

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Old 09-16-2020, 06:24 PM
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I suspect '91/'92 is about right for the OP's gun. I bought my 640 new about 93/94. It has a BPU prefix, and Julian date on box indicates '93 production. Carried it for years, until I had the opportunity to carry the lighter 642 instead

Just looked at my 940. It has a BPW prefix that I suspect is '93 production too.
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Last edited by Rock185; 09-16-2020 at 06:51 PM.
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