What is the age of a Sears Ted Williams 300 Winchester 1400 serial 12700?
I am not sure about the serial #, but the Winchester 1400 was introduced in 1964. Here is a timeline that shows when certain changes were made. It may help. Good luck!
http://www.winchesterguns.com/services/faq/detail.asp?ID=60
What is the age and manufacturer of a 20 gauge Sears Roebuck Model 21 583.2079?
This may help with the age question. I have owned the exact same Model 21 "Sears & Roebuck" 20 Ga. 583.2079 since 1966 when I received it from my father for Christmas (new in the box). It is NOT a Ted Williams version. From what I have read on this site, the gun was made by High Standard and is their Model K2011 Flite King. It is indeed an excellent shotgun. http://www.histandard.info/PDF/Sears%20Shotguns.pdf
What is the value of a 12 gauge Sears Model 200 pump model number 273.2250?
$125-$175. sales@countrygunsmith.net