I've heard the M was for Mowery, after seeing yours it looks more like an inspectors mark to me, but that is just personal opinion. The sad truth is we may never know for certain the marks placed on or the serial numbers of Thompson Center Muzzleloader barrels. Much like the arms requested by Meriwether Lewis at the Harpers Ferry Armoury, T/C history has been lost to fire and time.
ROCHESTER, N.H., March 28, 1997 -- Fire crews battled an explosion- punctuated blaze during the night at a gun factory complex in New Hampshire. Officials say the five-alarm fire destroyed three buildings at Thompson Center Arms and Thompson Tool Co., one of the largest employers in the Rochester area.
The blaze set off explosions in ammunition and oxygen and acetylene tanks, but no injuries were reported. Firefighters from some 20 surrounding communities responded to the fire, which broke out about 10:30 p.m. Thursday. Crews continued to battle hot spots Friday morning. Officials say they also called in personnel to check for hazardous materials. The company makes pistols, muzzle loaders, rifles and other custom weapons for international sale, and reportedly employs more than 500 people. Most of the workers were told to stay home Friday. The company store, a foundry and a water treatment facility escaped serious damage. ---