Could have been made any time from the early 1900's up to about 1960. The guns were made by Crescent, Harrington & Richardson, and Iver Johnson for sale by Hibbard, Spencer, Bartlett & Co. Value today is $35-$75, maybe $100+ if absolutely like new.
It's a shotgun, not a rifle. Value for the single-barrel 'Newport' guns in .410 run about $75-$100. sales@countrygunsmith.net
How much is a 16 gage single barrel shotgun model 350A Revelation
The 1894 was a side by side barrel the 1893 was the single shot
The patent for Newport Model CN double barrell shotgun is 1915, but Newport was a named given to guns made by J Stevens, Ivers Johnson, and Crescent Arms. So most likely it was made in the early to mid 1900's.
The value of a 1905 model D single barrel choke bored Diamond Arms shotgun is actually dependent upon a number of things. Most importantly the condition of the shotgun.
An early model Lefever single-barrel 12-gauge shotgun with a 30-inch plain barrel can be found for sale online for $300. This is the price for one that is in excellent condition.
How much is a new port shot gun worth
Your Winchester model 1911SL(self Loading)shotgun was first made in the year 1911.
Yes, you can remove the barrel of a model 66 Shotgun!
It is a single barrel, break-away 12 gauge shotgun.
The savage model 220 single barrel shotgun was made from 1938-1965.
Try posting at Remington Society of America.