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"I" Frames to "Imp. I" to "J". A Study....

19K views 25 replies 20 participants last post by  ar15ed  
#1 ·
James' thread about 1950's era S&W's got me going on this snowy January Sunday afternoon, and it inspired me.

Early post WW2 through the late 1950's was a period of intense development at Smith & Wesson with many new models and updates on existing designs finding their way into the catalog.

The small ".32" Hand Ejector frame platform was no exception. There is much confusion amongst budding collectors about the meaning of "I", "Improved I" and finally the familiar "J" frame's evolution.

What follows is my feeble attempt to explain this development with photographs of guns in my humble collection. I hope you enjoy this and that it may answer a few questions.

Post War "I" Frame.

This example of the .32 Frame Handejector is from the earliest Post War production, and carries with it many of the pre-war features.

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Note the "Hourglass" Cylinder Release, Half Round Front Sight, "Round-Top" Service Stocks, but the small-head Extractor Rod.

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The Strain Screw on the fore grip strap is evident, and is a tip off that this gun has a flat main spring, a key in identifying the pure "I" Frame.

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This gun's serial number nominally puts it circa early 1947, possibly 1946. According to the Production Tables in the Standard Catalog of Smith & Wesson, the first Post WW2 I-frame serial is 536,685 in 1946.

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Improved "I" Frame

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This .32 Handjector is 574,833 from about 1949 and is a classic "Improved I Frame". Note the retention of the prewar front sight, but the elimination of the Strain Screw in the fore gripstrap due to the introduction of the coil mainspring and the appearance of the modern, familiar Cylinder Release. Also, the Grip Strap Length is the same as the earlier "I" Frame. Magna style stocks are now standard.

"Baby Chief" .38 Special.

By 1950 the first Chief's Special makes it debut on the "Improved I-Frame". This early .38 Special "Baby Chief" is serialed just over 1,000 and is a fair representation. It is believed to be from 1950 production.

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Note that the Half Round Front Sight, the Small Trigger Guard, and shorter "I" Frame Grip Frame have been retained. Introduced are the true "Flat Latch", and the Lengthened Cylinder.

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Early "J"-Frame

By serial number 19,000 (circa 1952) or so the now familiar "J" frame has emerged.

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While still a 5-screw frame, this early J shows off the hallmark design features that would be prominent for more than 30 years in subsequent production. Note the lengthened grip frame and stocks. (A hint.... count the number of checkering lines below the "Diamond"). Also now standard are an enlarged Trigger Guard and Ramp Front Sight. An improvement over the "Flat Latch" Cylinder Release, this so called "Ramp" or "Burr" Latch will remain common and intermittent through the 1960's on some derivatives of the J-Frame, particularly the lighter weight Model 37's, etc.

I make no claim on authority of this topic, what I have shown is the results of my study so far and I stand to be corrected by further research or correspondence with my fellows.

It should be noted that there is still much to be learned about the Post War to 1960 .32 frame development and there is contradicting information existent surrounding these guns even within the Standard Catalog. Additionally, I have seen guns with "overlapping" features and with shipped dates out of sequence with their serial numbers. This makes the study of these neat little guns an exercise in clearing murky waters and uncovering previously unfound facts. Therein lies the goodness of the exploration.

Drew
 
#5 ·
Gizamo said:
Well done..Sir!

I've always wondered how to describe the various stock configurations. Was hoping that you might pull a few from your collection and talk a bit to the variances....


giz
Stocks? I love S&W Stocks...

That I may do.... as my schedule allows. Perhaps next weekend if we don't go fishing.... digging out all the various guns and stocks would be a challenge all by it's self....

I know DW was working on an article for the S&WCA Journal on this topic, so maybe I'll just hit some of the high spots for post 1900 Hand Ejectors.

I'm glad to hear that this study was well recieved.

Drew
 
#6 ·
Thanks Drew, I have come accross a few of those models but never in that condition. I really like the half-moon service sights of that era that Smith and Colt both used, simple and functional design.
 
G
#7 ·
Thanks Drew, and looking forward to it....

Folks often mistake I frame thru J frame stocks and sometimes all it takes is someone to point out the number of lines cut under the diamonds. But unless a historian puts it all together...it's all just piecemeal bits and pieces.

I applaud you and also Paul (DWFan) in your efforts...as we all gain.


giz
 
#8 ·
Glad to help close the informational gap.

I think that one of the things we are missing here on this forum are the fine points of collecting. This is a mistake. Sometimes stimulating the interest of someone new and helping them get involved in the history, development and design of the various types of Smith & Wessons only takes a well placed story to capture that interest and turn it into a life-long pursuit.

I know that's how I got started 40+ years ago now... and sharing with those interested and becoming friends in the process is to me, the best part of the hobby.

Drew
 
#12 ·
Well, now I know that the pair of small frame grips I picked out of a grip box are J frame grips. I figured out they would not fit a K frame and after that I gave up.
Good study on the smaller frames Drew, I have not ever gone there. I find them a bit small for my hand and sort of stay away from them.
I am trying to restrict my collecting to post war N frames, K22's and trading material.
Bill@Yuma
 
#19 ·
I have a Chief's Special that has me and some others stumped. The grip frame has been changed. A later model grip frame w/matching grips was spliced onto the earlier frame. Would the grip frame measurements/geometry of a Baby Chief allow for splicing on a J frame grip frame? The original SN is 9977. The grip frame and grips have SN 577569. You should be able to make out the splicing in the attached photos. My thoughts were that it was changed from a square butt to a round butt. I have no measurements of a shorter frame to go by. Thanks for any help that you can provide.

 
#22 ·
I'll create a sticky,
But it's going to be the original post only, and I'll lock it down to keep it original without all of the additional posting that followed.
I'm going to keep this thread unchanged and open for further discussion of otheres want to continue the conversations.

Regards,
Gregory
 
#24 · (Edited)
definitely a correct latch for an early postwar terrier. there are actually 3 subtly different styles, with yours being the third, that preceded the flat latch. used up til some time in late 52/very early 53 (when the "model of 1953" started using the flat type (three of those, too! got to love old smiths!)

i see yours is an "improved i" with the coil main spring. is your serial number range 57XXX-58XXXish? is the upper/rearmost screwhead on the righthand side flat or domed? most of the "improved i" frames had magnas, and that screwhead was flat to allow the grip to fit flush to the frame. if it is domed, it most likely had the small service grips, still.

i'm adding a pic showing the "domed" screw:


yours looks like a nice one!

ed
 
#25 ·
here's a pic of the earliest one, on a 32. they are actually a direct carryover from prewar. they are shaped like an hourglass, pinching in in front of and behind the screw area. the edges also "undercut" though you can't really tell it from the pic.


the next one is basically the same but the edges go straight down, without the undercut.

the third is like yours, with a little plumper profile. here is one on a '50 terrier. i haven't ever seen a postwar/4-line terrier with either of the earlier latches. leading me to believe that the supply of both of them had been exhausted by the "postwar" terrier's re-emergence in 1950.


the "model of 1953" features the flat latch, and switches from the early small "round" triggerguard to the larger "teardrop" style, losing the 5th screw in front of the triggerguard, and introducing the ramp front sight.