Neat looking M/N sporter.
Don't recognize the A.S.N.
(Assigned Serial Number ?? bad guess...but the rifles as made do have their serial numbers on the bbl and not on the rec'vr.)

If you want to know what year the orig rifle was made,,
Take the bbl'd action out of the wood. Turn the action over and look at the area immediately around where the rear tang screw is threaded into the action.
You should see a year date stamped there followed by a 'r'.
The 'r' I'm told is for 'year' in their cyrillic language.
The year date is usually a full 4 digit but sometimes only 2 if mfg in the 1800's (These are Model 1891 Mosin Nagants and variations).

It's with this date code that collectors/buyers/sellers determine if they have an Antique status rifle even if rebuilt at a later date which vast numbers were. The Finn M39's are a good example.

It's pretty amazing that the M/N in military dress has now gone to a $250+ rifle with the drought of the cheap $69.95 M91/30's imports from the Ukraine in recent years.
Remington and N/England Westinghouse M91 rifles in original configuration and nice condition can bring $450 and up.
Finnish use and modification models have a huge following, high prices as well.