Doug Richardson Wants Help
Posted 24 July 2003 - 09:00 PM
I have identified five 1921 Colt receiver variations and three Colt Trigger housings.
The receivers are:
#1: actuator slot with squared front end and “AUT-ORD-CO” bullet logo
#2: actuator slot with rounded front end and “AUT-ORD-CO” bullet logo
#3: actuator slot with rounded front end and “THOMPSON” bullet logo without “REG.
U.S. PAT. OFF.”
#4: actuator slot with rounded front end and “THOMPSON” bullet logo with “REG. U.S.
#5: actuator slot with rounded front end and “THOMPSON” bullet logo with “REG. U.S.
PAT. OFF.” and 1922 patent dates
The trigger housings are:
#A: “AUTOMATIC” & “SEMI-AUTOMATIC” pivot markings and fire/safe makings
with vertical arrows pointing downward
#B: “AUTOMATIC” & “SEMI-AUTOMATIC” pivot markings and fire/safe markings
with horizontal arrows pointing to front and rear
#C: “FULL AUTO.” & “SINGLE” pivot markings and fire/safe markings with horizontal
arrows pointing to front and rear
Therefore, to completely describe the configuration of a Thompson gun, it could be referred to as a “21 #xxxx 2B with vertical foregrip and ring sight” or “28 Navy #xxxxx 5C with horizontal forearm and compensator”, etc. I don’t know if this reduces or increases the confusion, but at least it is a start. Maybe we will all learn something with this.
It is my theory that the receivers were marked and serialized early in the manufacturing process and therefore will have progressive serial numbers establishing precise, in sequence, cutoffs for each of the five variations described above. It is also my theory that trigger housings were made without serial numbers. They were then placed in stock for selective fit to the receivers when they were finished. For that reason, the three variations of trigger housings will not necessarily correlate exactly to the receiver variations. Obviously, they will generally correlate because guns were being made continuously using the parts being made at the same time. The problem is, there are no records available to tell us at what serial number the changes occurred.
Please, all you guys lucky enough to have a Colt Thompson and even those who only have parts of one, let me know the serial number and the variation it applies to. If you care to include other info such as model marking other than 1921 (e.g. 1927, 1928, 1928 Navy, etc.) or other observations, that would be even more helpful.
Thanks, your help will be greatly appreciated.
TEL: 310-457-6400, FAX 310-457-3010, E/M: ThompsonSMG@mail.com
Posted 24 July 2003 - 11:05 PM
#3 variation receiver
#3 variation lower
Posted 26 July 2003 - 10:48 AM
I have 1921 Colt - serial # 289 ( matching upper and lower ) as listed on page 63 of Tracie Hill's book.
The receiver is a #1 variation
The trigger housing is a #1 variation
I also have a spare Colt trigger housing serial # 146 and it would fall into the #1 variation of your listings.
Posted 27 July 2003 - 09:59 PM
My three 1921's #304, #586 & #708 are all receiver variation #1 and trigger assembly #A
Posted 28 July 2003 - 11:31 AM
Is it true that New Zealand law prohibits the firing of any automatic weapons owned by civilains, yet, ironically, the law allows for civilian ownership of a fully functioning machine gun?
Posted 28 July 2003 - 08:02 PM
To be frank, the law has never been tested.
The attitude is what ever you do , we don't want to know about it and we don't want to hear about it.
One of the problems is the very high cost of ammo.
Also, only C class collectors, dealers and manufacturers are allowed to legally own full auto machine guns and sub-machine guns.
According to my understanding there is nothing to stop the guns from being fired in a controlled range. so as the correct licences are used and correct protocols on the range are used.
Hope this is of some interest,
Posted 31 July 2003 - 04:43 PM
A lot of good information has been coming in. To date here are the high and low serial numbers reported for each receiver variation.
1. 41 (starting production number)—2498
2. 2664 - 2796
3. 5278 - 8978
4. 9314 - 13054
5. None reported – 15040 (last production number
I need many more responses to narrow these ranges as you can see. It is interesting that one previously believed range has proven to be in error.
The trigger housings numbers have proven to be all over the place. Naturally variation As are mostly low numbers but variations B & C are almost a mixed random pattern. Interestingly by 2878 and 2889 are Bs but 2885 is a C. 4394 is a C but 6053 is a B.
More data is needed. Please keep sending me information.
Posted 04 August 2003 - 09:26 AM
I just checked a couple of 21's I just brought home along with a 1928A1 so her goes:
1921 Ser#26XX is a 2C configuration
1921 Ser#45XX is a 1C configuration
Hope this helps. Unless I read your post wrong the Ser#45XX is an oddball.
Posted 05 August 2003 - 10:04 AM
21 ac #7717 is a 3c
28 #5741 is a 3c
Posted 09 August 2003 - 04:55 PM
Until more responses come in, the following Colt serial number ranges are estimated as follows:
1st Variation: 41-1999
2nd Variation: 2000-4999
3rd Variation: 5000-9999
4th Variation: 10,000-13999
5th Variation: 14000-15040
A Variation: 41-2499
B Variation: 2500-2799
C Variation: 2800-15040
I must emphasize that these are roughly estimated ranges subject to refinement. It is not the highest number of a variation that is critical, it is the lowest. Please keep sending the information.
Posted 10 September 2003 - 02:39 PM
sn 694x [why don't people put the whole serial number on?]
Type 3 receiver type 3 lower
sn 730x This is a mismatch--the upper is 730x, and the lower is actually 230x
Type 3 receiver type 1 lower [as 230x]
Sorry reply took so long. Had to get appropriately registered.
Posted 12 September 2003 - 01:16 PM
6942 is a 21AC
7308 is the mismatched one--the lower is 2308, beautifully stamped, as all Colts were, but the "2" is scratched over such as would happen by using an electic engraving pencil, to try to make it look like a "7." The "308" are nice and clear.