A history of Mossberg has been written and is available on Amazon
Think you have a New haven 250K. If so, it is the same as the Mossberg 152K, made from 1950-1957.
The Mossberg plant moved from New Haven to North Haven about 1962 when the Interstate (91?) came through the old plant.
1888 at the New Haven, Connecticut, factory.
To determine the age of a Mossberg New Haven 600AT with the serial number H648702, you'd typically need to refer to Mossberg's manufacturing records or a detailed serial number guide. Generally, the "H" prefix indicates it was manufactured in the 1970s, but for an exact year, you should consult specific resources or contact Mossberg directly.
The New Haven, Connecticut, plant closed on March 31, 2006.
Answer: The Mossberg Rifle 45A alone is currently (2009) valued at around $200 or a bit more in very good to excellent condition, however, the "S" prefix denotes that it was sold with a scope. The No. 7 Mossberg scope and bases currently run around $200.00 - 350.00 or more depending on model and condition.
New Haven, Connecticut
You will have to contact Mossberg
New Haven is a region. It is located in Southern Connecticut.
The address of the Yale Peabody Museum Of Natural History is: 170 Whitney Ave, New Haven, CT 06511
Yale University is situated in New Haven, Connecticut.
New Haven Connecticut is the 18th most dangerous city in America. (2010)