Blue Book of Gun Values
Possible places to look include the internet, the library, company website.
UMC refers to Union Metallic Cartridge company. They are owned by Remington and only make ammunition not firearms.
Marlin Firearms: A History of the Guns and the Company That Made Them by William S. Brophy
No serial number records exist, but the company was in business from 1908-1915.
Not much information is available on Meriden Firearms, but you might go to the library and locate Flayderman's Guide to Antique American Firearms. Then look through all the books on that shelf. The Meriden company was set up by Sears Roebuck to manufacture firearms for sale through their catalog and retail stores. It lasted from about 1905 to 1915.
Firearms marked Hartford were manufactured by Crescent Firearms for the Simmons Hardware Company of St Louis c. 1890-1930.
Check out gunshop.com,they got Lots of info on dbl barrel shotguns.
There's a whole shelf of books on firearms in your library. Or you may find information on www.savagearms.com
Library, gun shop, gun shows, the internet
There was no company with that name. Crescent, Davenport, Stevens, and Pieper (Belgium) all furnished firearms for Shapleigh Hardware with variations of the Central Arms name.
I can't find a cross-reference for that number, but Eastern Arms was a trade name used by Sears Roebuck. Most of the shotguns were made by Stevens/Savage.