View Full Version : Postal meter marking
Hi. What is the meaning of a U stamped on a National postal meter receiver below the ser no? Is it rare and does it increase the value or desirability of the rifle? Thanks
jim c 351
Receiver was made by Union Switch and Signal. Don't know production amounts
Union Switch & Signal had a contract to supply National Postal Meter with 90,000 M1 Carbine receivers, and delivered 50,052 between August of 1943 and March of 1944.
US&S also supplied NPM with 64,602 slides and 54,593 bolts during the same time period.
US&S was also to supply Rock-Ola with receivers, but none were delivered. Another 28,949 receivers were delivered to Quality Hardware & Machine.
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