Your serial number indicates that you have a winchester model 101 in 20gauge.This shotgun was made by winchester in 1966.
I would say that with the serial number that you provided,your Winchester model 101 shotgun was produced in the year 1972.
The Sureshot shotgun was made by Cooey Machine and Arms company of Cobourg, Ontario, Canada. Cooey was purchased by Winchester-Western and produced rifles and shotguns under the name of Cooey, Winchester-Cooey, and Winchester.
1977
download from Winchester home page, will be listed under manuals category.
Your serial number identifies your Winchester model 101 shotgun as being chambered in 20ga,and having been made in March of 1966.
Its a 12 guage over/under shotgun.
The highest grade for diamond clarity is "Flawless" (FL). This means the diamond has no internal or external imperfections when viewed under 10x magnification.
The Sears M300 (also sold under the label Ted Williams) was manufactured by Winchester. The M300 is almost identical to the Winchester model 1400 shotgun (with minor cosmetic differences).
Like new
This cannot be answered without a more detailed description of your shotgun.Is your shotgun a semi-auto,over under,pump action,single shot?What markings are on your shotgun?What is the barrel length?
Model 301 is unfamiliar. No record is found with that number. There is however a Winchester model 101, and it was made in the Pigeon Grade. The model 101 is an Over/under design and was made in several different configurations.