Colt MK IV series 70

[BILLLINC]

I have a Colt MK IV Series 70 Government Model .45 ACP with S/N 56142B70. In what year was this pistol manufactured. Thanks

 

[BullfrogKen]

Did you try calling Colt? They will tell you right over the phone.

 

[Rock185]

My Colt serial number guide indicates 1980...