The value of a Mossberg New Haven bolt-action 12 gauge shotgun actually depends on a couple things. Most important would be the condition of the shotgun.
Yes, the 600 At is the same model as the 500 series, but with a different designation for sale in New haven stores. So yes, all Mossberg 500 after market or OEM parts will fit it.
$130-$150 in good condition, great gun
I do not think Mossberg made a 220K. The New Haven 220K (single shot bolt action 22) cross references to the Mossberg 320K. Value is around $100-$125. Excellent first rifle for a new shooter.
You will have to contact Mossberg
About $100-175, depending on condition, finish, etc.
No
You have Mossberg and then New Haven, depending on condition these are usually valued between $50-150 with the New Havens bringing the top dollar. Again, this based on condition, pits, scratches, and rust on the barrel/chamber will and do lower the value. Stock condition drops as well with any wear too.
Think you have a New haven 250K. If so, it is the same as the Mossberg 152K, made from 1950-1957.
Send it to Mossberg they can tell you anything you need to know about it and then some. You wont get alot out of calling them.
The O.F. Mossberg No. 83 is a .410 gauge shotgun produced by Mossberg in the mid-20th century, primarily between the late 1940s and early 1960s. The age can typically be dated around this period if it includes "New Haven, Conn." in the markings. The value of a Mossberg No. 83 in good condition generally ranges from $200 to $500, depending on its condition, completeness, and market demand. For a more precise valuation, it's recommended to consult a firearms appraisal expert or check recent sales of similar models.
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.