believe after 1971
100-400 USD
mk is short for 'mark'
You will have to call Colt
The Colt Lawman MK III revolvers were produced from 1972 to 1986. To determine the specific year of a particular Colt Lawman MK III, you would need to reference the serial number against Colt's production records or use a Colt identification guide, as the serial numbers were issued in a sequence that can help pinpoint the manufacturing year.
Go to Colt's website and request a manual.
You will have to call Colt to find out.
You must call Colt.
i would like to know what year that colt MK IV series 80 with serial # 302587 manufacture and what made is this?
Fourth variation.
Call Colt.
Proofhouse.com has Colt sn data