Hello M8665
You've been unsuccessful because you just didn't ask in the right place. Now I need to, know a bit more before I can answer your question correctly- Is the gun a single or a double barrel and if a double barrel, does it have outside hammers or is it hammerless? All that information makes a difference. I can answer part of your question, the part about the name BRIDGE GUN CO. The name is what I call a "Trade Brand Name". Between about 1880 to 1940 there was a great interest in America in all things having to do with shotguns, designing, making, selling (especially selling) and of course, shooting. Wholesale sporting goods dealers, retail chain stores and independent retailers (your local hardware store) wanted shotguns with names of their own choosing stamped on them to sell. The major makers were only too happy to meet this demand. They would stamp almost any name in the world on one of their standard models if the order was large enough. It has ben said that the largest maker ever of such guns, Crescent Fire Arms Company of Norwich, CN (1892 to 1930+) would mark as few as twelve guns if the buyer paid for the die needed to stamp the name. Guns with the name BRIDGE GUN CO were made by one of three makers, Crescent Fire Arms Co, Harrington & Richardson Arms Co of Worcester, MA (1871 to 1985) and the Stevens Arms & Tool Company of Chicopee Falls, MA (1864 to date) for and were sold at wholesale by one of two wholesale sporting goods dealers, either the Belknap Hardware Company of Louisville, KY or tehe Shapleigh Hardware Company of St. Louis, MO. Lord knows who sold it at retail. Now I'm going to make an educated guess and say your gun is a single barrel and the serial number is one of Crescent's. The records for the Crescent Fire Arms were lost in a scrap paper during World War Two in 1943. The late shotgun researcher and writer Mr. Joseph T. Vorisek re-established the serial number-year made tables as part of his research for his book "The Breech Loading Shotgun In America 1865 to 1940". His work is only an approximation but it's all we have. According to those tables (and if it's a single barrel), it was made in April of 1927, well 1927 anyway. The serial numbers for 1927 begin with 630,000 in January and end with 651,000 in December. That's 21,000 guns for the year, divide by twelve and it's 1,750 guns a month. You can do them math. Now I charge $3.00 for information about an old shotgun ($4.00 for correct information). Please put a $3.00 bill in the small slot on your computer and hit the send key. Don't use a $5.00 bill as my computer is not programed to make change.