Blue book of gun values
Firearms manufacturer in Lancaster, Pennsylvania, c. 1910-1920.
Mississippi Arms Co was a trade name used by the H.D. Folsom Arms Company on firearms made for the Shapleigh Hardware Company of St. Louis, MO.
www.google.com
Most likely a store brand.
Contact information is listed on their website
The company that is listed in the related links IS NOT the Buffalo Arms in question that made Buffalo Arms Derringers. The company went out of business long ago, and there are no known websites, or information regarding them.
No known history published on this company
Here's what little I can find in the Standard Catalog. Incorporated in 1902. Used the names Union Fire Arms, Union Arms Company, Illinois Arms Company and Bee Be Arms Company. In 1917 the company was either bought up or absorbed by Ithaca Gun Company. They manufactured slide action shotguns, hammerless doubles, a few single shot shotguns, and a couple semi-automatic pistols.
This was a trade name distributed by Shapleigh Hardware of St Louis on shotguns made by Crescent Fire Arms (1892-1931) and J. Stevens Arms and Tool Company (1886-1916).
Eastern Arms Company was a trade name used by Sears Roebuck. The guns were manufactured by Meriden Arms, Iver Johnson, Stevens, Savage, and probably others.
I find no listing for "London Arms Co." Provide more information or take the firearm to a local gunsmith for a professional appraisal.
CRITERION BARRELS is in the Small Arms industry in RICHFIELD, WI. This company currently has approximately 20 to 50 employees and annual sales of $1,000,000 to $4,999,999.