My father was a Marine Corps Gunny and Korean War veteran. He qualified marksman and decades later when the CMP began providing M1 Garand service rifles they also at times would allow for a serial number search when choosing your grade of rifle and manufacture. Our dad carried an IHC (International Harvester Corp) mix master and new his issued serial number. It took some time but the CMP found a service grade IHC within 1 number of his issue rifle. So he knew that someone in his division -company -squad was issued this rifle and carried it. He loved shooting this rifle. He shot left handed because he was partially blind in his right eye from starring at the sun as a child and had a blind spot. His right eardrum was shattered when he was to close to a claymore detonated near him while training on Okinawa before deploying to Korea. God bless you dad.