.276 Pedersen, the original M1 Garand caliber. Loaded by Frankford Arsenal in 1929 during the early development of the M1. The box is in amazing condition for being almost 100 years old. Lot number is only 23.
Re the pedersen rifle --
saw one about 1960 at a local gun show in mountain view calif--
Man wanted about $500-600 then -- Having just bought a 03a3 for 25 I was tapped out --They are really a fine example of machine work --