Serial number is on the frame.
proofhouse.com
210-52996 is the serial number. Mark 2 would be the series. 50-175 USD or so
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On the frame
September 18, 1871
You will have to call Colt to find out.
1980-1983
You will have to call Colt
How can I find out what year Colt Combat Commander Mark 4 Series 80 was made?
Serial numbers are used by the factory to keep count on total number of firearms made in any given model.
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around 1980.