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
The Remington 740, a semi-automatic rifle, was produced from 1939 to 1963. Serial number 27195 would likely place its manufacture in the early 1940s, as the production numbers indicate that the earlier models were made in the 1939-1940 range. For precise dating, consulting Remington's production records or a dedicated resource on Remington firearms would be necessary.
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.