Unusual serial number?

[bobg]

Picked up a Quality HMC carbine today but the serial number starts 1,983,xxx. My book says this isn't a QHMC number. A mistake in the book?

Information

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[JimF4M1s (Deceased)]

I am guessing your book says it is a Std Products receiver? Do you have a picture of the serial number and maker name?

[bobg]

that's right, Riesch's book. Sorry, can't do pictures. The number is plain as day. A type 2 rear sight covers up the name but I can make out the first 3 letters QUA by looking under the edge of it.

[deldriver]

Simply stated, is it a springtube model or not? A QHMC in that range could only be a springtube.

[bobg]

Its a spring tube type.

[Bruce McAskill]

Could the serial number be 1,933 instead of 1,983? A three instead of an eight?

[JimF4M1s (Deceased)]

Could the serial number be 1,933 instead of 1,983? A three instead of an eight?

Reason I asked for a picture.

[Bill Hollinger]

Bob, slide a piece of tin foil between the rear sight and the receiver. Then take a piece of dental floss and drag it back and forth across the the tin foil with downward pressure until the receiver stamping is transferred to the tin foil. This will give you a perfect impression of the stamping.

[bobg]

Tried the tin foil trick. Was able to raise the word Quality. In looking at the numbers, the 8 has a larger rounded bottom and a smaller rounded top. The 3 has a larger rounded bottom and the top has a flat top with a angled right side. Quite a different style.
The numbers are very clear, crisp, and easy to define.

[Bruce McAskill]

Does the carbine have a type 1 rear sight or is an adjustable type? If adjustable I would suggest to try and remove it for more possible stampings under it.