Roughly mid-1960s. Universal is gone, and so are their records of production.
No verified published sn How_old_in_your_universal_m1_carbine_serial_number_87046in the public domain
No verified published sn data in the public domain
Universals are a civilian version of the M1 carbine, made after WW 2. No serial number data is available for the civilian carbines- sorry.
ABOUT 1962-63. I say ABOUT since Universal is gone, and so are their production records. Yours may be from the first year or two that the Universal brand was used.
what year was my Winchester M1 carbine serial number 1210906 manufactured
To determine the manufacture date of a Universal Enforcer 30 cal carbine pistol with the serial number 159193, you would typically need to refer to the manufacturer’s records or contact a firearms expert or collector who specializes in Universal firearms. Universal Firearms produced these carbines primarily in the 1960s and 1970s, so the date is likely within that range. However, specific serial number databases or manufacturer documentation would provide the most accurate information.
Sorry, but know of no public database for these rifles. Generally they are not in the same database as military M1 carbines.
The m-1 is 99% new condition all original and maybe worth $10,000 .
With the serial number that you provided,your Springfield model 1873 Trapdoor Carbine was produced in the year 1877.
If you have a Universal brand M1 Carbine, they are out of business, and left no production records. Your serial number is one of the later ones made. See the link below for some information on the company.
Around $500, depending on condition.
$500