Go to proofhouse.com and click on diamondback.
In 1969, Colt produced approximately 3,500 Diamondback revolvers chambered in .38 caliber. The Diamondback was introduced in 1966 and gained popularity for its design and performance. The production numbers varied each year, with 1969 being one of the years with a notable output.
You can find out at Proofhouse.com
Produced in 1939.
1974
age would be determined via serial number
100-1000 USD depending on what "very good shape" translates to.
1896
about 1958
what model and cal. pistol/revolver ????????????
@1919
by the serial number.........................
@1956