.270 has been around since 1925. You will have to contact FN to check on the sn.
$300-$450. This rifle was made either by Heym or by FN. If a true Mauser action it will be made in Belgium by FN. Otherwise it will be a Mauser 3000 made by Heym.
My F.N. Mauser in .30-06 s/n 4570 was made in the mid 1950's. I have been unable to learn any more regarding the F.N. mausers. It is a true a classic, hope this helps
FN
No serial number provided.
Fabrique Nationale or FN is the maker.
What model gun is this?
Impossible to answer without more information. Generally, Western Field rifles were made by Mossberg and Marlin, but some were made by FN and were Mauser actions.
Fabrique Nationale, or more commonly known as FN
It is an FN made Mauser 98 action worth $300-$400
My best Guess would be to contact Husqvarna because they made it for sears. The Model 51 was made by High Stadnard using a FN Mauser action. The Model 51-L used the HVA action http://www.histandard.info/manuals/sears/cfrifles/index.html
You will have to call FN to find out.