Most of these models were made in 1906 or 1907 making it an antique. If the weapon has little of its own finish, the value decreases dramatically. If kept in excellent condition the item can be valued at $20,000.
1927.
If it doesn't say Lefever somewhere on the gun, I don't think you have a Lefever.
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.
The Lefever Arms Co. was known for producing shotguns from the late 1800s until the early 1900s, with the serial number you provided (136844) likely dating your shotgun to around the early 20th century, possibly between 1910 and 1920. The value of a Lefever side-by-side shotgun can vary significantly based on its condition, configuration, and features, typically ranging from $500 to over $2,000. For an accurate appraisal, consider consulting a firearms expert or appraiser familiar with vintage shotguns.
A Lefever 12 gauge shotgun with the serial number 185518 was likely manufactured around 1915. Lefever shotguns were produced in various years, and the specific serialization can help narrow down the production date. For the most accurate dating, it’s advisable to consult a detailed Lefever serial number reference or a firearms expert.
Your Shotgun was made by Lefever from 1885-1919.Lefever started business in the year 1885.A (G grade) model hammerless 12 gauge shotgun will range in price from 800-1,400 dollars for a gun showing between 10%-70% of its original finish remaining,and a good set of bores.
The Lefever Nitro Special is a classic American-made double-barrel shotgun, known for its robust construction and reliability. Produced in the early to mid-20th century, it features a side-by-side configuration and is chambered for 12-gauge shells. Renowned for its affordability and solid performance, it was popular among hunters and sport shooters. Collectors appreciate its vintage design and the craftsmanship characteristic of the Lefever brand.
The LeFever New Nitro 12 gauge shotgun was manufactured from 1936 to 1948. If it is in good condition, it can be worth about $400 to $500.
To get a parts breakdown you would need to take the shotgun into a gun store. The store will be able to provide an estimate, or order new parts.
around $6000
According to doublegunshop.com the year of mfg would be 1922
Blue Book of Gun Values