That's not a Mk III, it's a standard in walnut/blue. Much nicer finished pistol than the Mk III and not nearly as common.
This gun is from 1989, therefore it is a MKIII. They quit making the MKII's in 1987...
To be specific it is a MKIII Standard (there are several variants of the MKIII)....this gave it the blued finish over the base model's black epoxy painted finish and wood grips over the base model's rubber grips...
