Remington 11's are essentially Browning type shotguns with lesser values because of the name brand associated with the latter manufacturer. It is possible to find a Remington model 11 with an extra barrel with a different choke. The installed barrel and the extra barrel should have serial numbers.
Rifle, handgun and shotgun can all have "long" barrels
no not all twist barrells
They are all date code stamped, see related links for information on the Remington Society of America.
The Sears 200 is a Winchester Model 1200 with some minor modifications. Winchester 1200 of the same gauge will fit the Model 200 receiver. Buttstock and trigger group will not interchange.
They were made from 1931 to 1949 so they are all date code stamped. See related links for information on the Remington Society of America
The expression refers to a double-barreled shotgun. To "give (something) both barrels" is to make the maximum effort at the task. ie. use both shotgun barrels. It is similar to the expressions, "give it your all," "go all-out," "one-hundred-and-ten percent," and to give something "...the whole nine yards."
If you can, it would be the newest model 311-H, and it would be stamped as such on the barrels. All the older 311 models were 2 3/4" only.
Impossible to answer with only the sn. Need a detailed description of all features, type of action, gauge, number of barrels, barrel(s) length, etc..
Probably December 1927, the date code is stamped on the barrel, all details on the Remington Society of America, check related links.
All were pinned
First of all describe the gun. Is it a revolver, or a shotgun? A revolver has a grip but so does a shotgun (actually a for end).
There's a whole string of Sears 300's with different Sears ID numbers, but they are all the same Winchester Model 1400.