Have one that was made in 1943
your Remington model 512 was made from 1940-1962,with a total production of 395,000 guns.
They were made from 1923 till 1940
Mint 30 Remington what? Rifle? Model? Variation? (carbine?)
1940-1962 Will be date code stamped, see related links for details.
Value of a weatherby .300 magnum made in germany
The first fully automatic transmission (the Hydramatic) came out in the 1940 model year by Oldsmobile.