Nitro King was a trade name sold by Sears Roebuck and H&D Folsom Sporting Goods. Manufactured by Crescent Firearms, Norwich, CT, c. 1905-15. You can invent any history you want for the last 90-100 years, 'cause no one was keeping track of it. It most likely has fluid steel barrels and could still be used as a field gun, if approved by an experienced gunsmith. But if it has a side-hammer, it probably also has a twist-steel barrel and should be a mantle decoration now. Should be worth about $50-$75 for either use.
Seldom exceed 150 USD
50-100 or so
Single barrel, tops out at $75. Double-barrel, tops out at $175. email@example.com
I believe that King Nitro was a model name of Shapleigh Arms Co, St. Louis, MO.
You have already identified it as a Shapleigh's King Nitro. Shapleigh Hardware was in St Louis Missouri from the mid 19th century until the middle of the 20th. Their King Nitro guns were manufactured by W.H. Davenport and later by Stevens/Savage.
BLue Book of Gun Values
50-125 or so
Follow the link to the related question.
$75-$100, depending on condition, exact model, etc.
NITRO KING was a trade name used by Sears on guns they retailed through their catalogs in the late 1880's through World War I. There is no appreciable collector value, and these guns are generally considered unsafe to fire due to the twist steel barrel. Value would be in the $50 range. firstname.lastname@example.org
@ turn of the century; wall hanger to maybe 100 USD
Both 'King Nitro' and 'Central Arms Co' are trademarks of the Shapleigh Hardware Co, which was a major catalog retailer from the late 1800's well into the 20th century. The shotguns marketed under that name were made for Shapleigh by different companies, notably Davenport Firearms, Crescent, Hopkins & Allen, and Stevens. We'd have to see the shotgun to determine which manufacturer actually made the shotgun. www.countrygunsmith.net
That patent date indicates it was made by Stevens/Savage. In NRA Good (won't be able to grade any higher if refinished) should be worth around $200-$250 retail. Being a 16 guage may lower the value in some parts of the country.
Nitro King was a Sears Roebuck brand name made by Crescent Arms, 1908-1917.
i got a 12 gauge king nitro double barrel double triggers and double hammers no serial number on it
I have one, double nitro breech, and a hexogan barrel half way down. Never seen one like this.