It would be worth approximately $125.
Check w/ Browning, but I think you are correct- BOSS will interfere with iron sights.
There are a few places you can find a Rear sights for a Savage Model 120. The most popular place to look would be online or a gun store.
Grips, magazines, sights.
Best to ask a gunsmith for assistance
No.
No
50-500 usd
Most aftermarket sights are fiberoptic types such as Williams FireSights or the Tru-Glo sights. I dont know of any specific target applications.
Did you go to Browning on line? Most gun sights will tell you. Mine is #303xxx and was made in 64.
try here http://www.brownells.com/aspx/NS/Home/default.aspx or try Williams Sights I don't have the link handy
The Savage model 3 series featured a 26 inch barrel,or 24 inch barrel(post War),with open sights,plain grip stock.These rifles were produced from 1930-1947.
This type of information is not published. Perhaps it would be best to request that information from Browning directly. As a rule, Browning has never released production figures, but simply the serial number sequences.