Nobody. Iver Johnson was dissolved in 1993.
The Ivor Johnson 5-shot revolver with the serial number 24033 is typically from the late 19th to early 20th century, likely produced around the 1890s to 1910s. The value of such a firearm can vary significantly based on its condition, rarity, and historical significance, but it generally ranges from $150 to $500. For an accurate appraisal, consulting a firearms expert or appraiser is recommended.
50-125
a million dollars!
The presence of a ring in the trigger guard of your Ivor Johnson 12-gauge shotgun suggests it is a break-action model, which is common for shotguns of that era. Serial numbers located in multiple places—under the stock, on the barrel, and on the trigger guard—can help verify the authenticity and age of the firearm. If you need further information or a valuation, consider consulting a firearms expert or collector.
the 'bluebook'
The company existed with that name from 1871 to 1987. A great source of information on Iver Johnson firearms is the book by W.E. Goforth titled, "Iver-Johnson Arms & Cycle Works Firearms 1871-1993".
http://www.geocities.com/iverjohnsoncollector/
You have to look it up in a book like "2008 Standard Catalog of Firearms" or a similar book. There is a large section on Ivers Johnson firearms.
The first iver Johnson firearms with this name appeared in 1883.
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A Great source of information on this firearm (and most other Iver Johnson firearms) is the book by W.E. Goforth titled, "Iver-Johnson Arms & Cycle Works Firearms 1871-1993".
In 1983, the company was purchased by Iver Johnson Arms of Jacksonville, AR, but remained a separate division as Universal Firearms in Hialeah until closed and liquidated by Iver Johnson Arms in 1987.