Yes.
$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.
hard to say for sure, but you should try Numrich Gun Parts Corporation. This was a FN Belgian Mauser action, with Sako trigger, so depending on what parts you need, either FN or Sako will also have parts interchangeability. FN is still around in business.
.270 has been around since 1925. You will have to contact FN to check on the sn.
100-1000 or more depending on specifics
IIRC Mossberg. No sn data available. - I own one of these, they were made by FN using Mauser actions. The markings are on the receiver under the stock. Mine does not have a serial number, from the info I could find on when Mauser made that type of action (Sako trigger, sliding safety) my guess is it was made in the 1950s.
I made videos detailing the complete disassembly and reassembly you can find them by searching "detail strip Mauser HSc" on YouTube.
It is an FN made Mauser 98 action worth $300-$400
DO NOT ATTEMPT TO FIRE UNITL EXAMINED BY A COMPETENT GUNSMITH!!!!!!!!!!!!!!!! Danger, Danger, Danger
I have a remingon 37 field service manual weight of the trigger pull may be changed by turning trigger pull adjusting screw to the right , or clockwise for heaver pull off ,and to the left ,or counter clockwise for lighter pull off . adjust trigger adjusting screw rear until lengthwise lap of sear and bolt stop is about .012 " ( gun cocked safe is off ) turn trigger adjusting front screw front in as far as it will go ,then back off until trigger will fire . now back out trigger pull adjusting screw until it is free of trigger spring weight trigger pull . pull should be under 3 lbs. turn in screw until desired pull is obtained . kansasroadrunner@embarqmail.com 03-14-2008
See the link below for the Owners Manual. Read the section "Adjusting the Trigger."
Best left to a good gunsmith