Built as an experimental rifle, to transition from the previous 30-06 Springfield round to the newer 7.62x51 NATO round, during the attempt to standardize military ammunition. The barrel has none of the markings commonly associated with the model, with no military proofs, or dates. Standard markings are found on the rear of the receiver with model, caliber, manufacturer and serial number. Left face of the receiver has an area milled flat and marked "T-35/MOD. AT S.A./1950/CART:T65E-3" All parts are late model Springfield Armory. Oil finished walnut stock, is mounted with sling swivels and a checkered trapdoor buttplate. The left stock face is marked with a boxed "SA" cartouche and a circled "P" inspectors mark on the inside of the wrist.