Made by Leinad Inc. in Ducktown, TN. Phone # 423-496-7060.
To contact FMJ makers of the 45/410 Derringer write to Leinad Inc.... PO Box 579 ....... Ducktown,TN 37326
It is whatever the BATF (Bureau of Alcohol, Tobacco, and Firearms) says it is since they do the legal defining of firearms. Since Cobray did the modification for sale, I suggest that you ask them, since they surely vetted the firearm through the BATF before selling it.
Go to gunbroker.com and enter Leinad in the search block.
Do you mean the company called "Firearms International, Inc"? Firearms International, Inc was purchased in September, 2004 and currently exists under the name Crusader Group Gun Company, Inc of Houston, Texas. For a catalog of what they offered many years ago, try http://www.cornellpubs.com/Templates2/FI 1969.htm
At Gunstocks Inc.
From e-gunparts.com
Making and repairing firearms.
They did not make firearms. They contracted with makers of firearms to put their name on the firearms they bought.
Almost certainly NOT an antique. Made by Leinad Inc. in Ducktown, TN. They also made a side by side .410/.45 derringer. I have one and it is very impressive to shoot.
A typical starting load for the ball and cap Leinad pistol would be about 15 grains of fffG powder.
Sears never made firearms. They "branded" firearms from firearms makers with their name as part of a contract.