2 3/4
The Model 620 was produced from 1926-1945. sales@countrygunsmith.net
About 100.00
Try searching for a Savage model 620A or Stevens 620 stock on ebay, or gunbroker.com. The model M060 Westernfield is a Stevens 620, while a Westernfield model 60 is the Savage 620A
1926-1945
The 620 was the original production run, the same gun with minor variations would be the second run and there for the -A. I have a Savage model 1899. This gun was run all the way up to 1899-M
Looking atThe GunDigest Book of Firearms Assmbly and Disassembly, it appears that western Field Model 30 SB562A is the same as a Stevens Model 520 which was made from 1915 to 1930. Very similar models of Stevens (620 and 621) were made from1927-1953. My best bet on Western Field is that it is either a Model 620 or 621. The 520 was also sold as a Sears "Ranger' model so Western Field was probably a 620 or 621. the cross reference for the SB620A Westernfield is the 620 Stevens. Check it out on http.//www/e-gunparts.com/crossref.asp
http://www.gun-parts.com/index.html/
stevens model 620
Check the receiver and barrel.
That is not a model number, but is likely the serial number. Unless you have a Model 620 US marked Trench Gun, Stevens pump shotguns have little collectors value.
what is the value
$75-$200 depending on condition