Assuming it is the Model 81 Woodsmaster, excellent condition examples in .35 Rem are bringing more than $400. sales@countrygunsmith.net
Remington
Have one that was made in 1943
1964
your Remington model 512 was made from 1940-1962,with a total production of 395,000 guns.
They were made from 1923 till 1940
Browning, Remington
1949-1968
$2
1940-1962 Will be date code stamped, see related links for details.
Mint 30 Remington what? Rifle? Model? Variation? (carbine?)
The first fully automatic transmission (the Hydramatic) came out in the 1940 model year by Oldsmobile.
The RH 50 was a Boy Scout knife made from 1925-1940 with several variations.