This rifle was manufactured for Montgomery Wards by Mossberg between 1938 and 1941. It is equivalent to the Mossberg 42C. I have seen rifles for sale with missing sights and in rough condition for approximately $60. Obviously for a gun of this age, if it was in excellent condition, with original papers, etc. it could bring several hundred dollars.
It dosen't have one, too old!
http://www.e-gunparts.com/productschem.asp?chrMasterModel=0840z353&SortBy=DESC
SO much!
The value of a 22 SLLR Sear Roebuck model 42-103.19791 depends on its condition. This gun in excellent condition is valued between 85.00 and 125.00 as of 2014.
15-50 USD
10-100 usd
50 or so; no published sn data.
I know of 2 for sale at $100 (and they are still for sale). I read an article on line that said $150 if it is new in box
SLLR indicates that the weapon is chambered for Short, Long and Long Rifle rimfire ammunition.
I can't find a cross reference to the Western Field mod 804. If you can identify the manufacturer of that rifle (because Western Auto did not manufacture any guns - they bought existing models from a variety of manufacturers and had the Western Field name placed on them instead of the actual manufacturer) then parts can be procured from several sources. I suggest that you consult a gun values book to determine who made the rifle. Mossberg, Savage, Marlin, Noble, Stevens, and Colt all sold different guns to Western Auto. Possible sources of replacement parts are: Numrich gunpartscorp.com Jack First jackfirstgun.com Bob's Gun Shop gun-parts.com Order the parts by the actual manufacturer and correct part number. Some of these sites have exploded diagrams to assist identifying the parts.
Average price for the rifle itself in VG condition is $75-$125. The scope could add some value depending on the type of scope. Worn rifles of course have less value.
MARLIN'S WEBSITE! about $13.00 each.