Standard Products Date?

[ChipS]

I'm getting conflicting info on probable date (month) of manufacture of 2,109,xxx Standard Products receiver. My data base is not very extensive. Can I get some opinions? Thanks.

Information

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[Rustship]

I would say 12-43' give or take a month

[gsimmons]

Barrel date on my 2.01 carbine is 8-43. It's not a rebuild.

[Rustship]

That would be about right! Just taking production numbers for each month out of War Baby and adding them up against serial numbers. Not exact, but close. Yours is quite a ways lower than Chip S's number

[Patrick Chadwick]

My Standard Products 2,200,xxx has a 12-43 Underwood barrel. All original, as far as I can tell.

[Rustship]

From War Baby

Single Serial Number Block (Standard Products)
1982520 to 2352519

1943
April - 221
May - 1,505
June - 3,486
July - 8,003
August - 15,000
Sept - 20,125
Oct - 26,665
Nov - 33,000
Dec - 39,000

1944
Jan - 30,000
Feb - 28,600
Mar - 23,400
April - 18,005

As you can see, they really ramped up starting in Sept, Oct of 1943, and peaking in Dec 43. Use the math, and you can get pretty close.

[Patrick Chadwick]

Use the math,

I did, and that all only brings us to 2229530 at the end of April 44. I presume production must have continued for some months to reach the 2352519. Can you continue the list to the end? Or was that the end?

[Rustship]

I missed, 150 were added in July 43 after paint clean up, for a grand total of 247,155 carbines produced. I agree if you add up the numbers, they do not match the end of the Serial Block. All I can guess is that they did not use the whole Block of numbers before production quit. Production was ceased in April of 1944.

[Bruce McAskill]

December 1943 for the 2.109 serial number.

[deldriver]

My 2.23 SP has an Underwood barrel dated 3-44. I wonder what the official last SP was too along with some of the other manufacturers too. I guess the real question is how many unused serial numbers there were for SP and say IBM and NPM too.