That Dimension looks very similar John, at least from what we can see in the small pic.
There are a couple of things that don't quite fit though.
Tman's guitar has a 6-digit serial which we think ended sometime in '81 (MIJ). The Dimension (MIK) would have an 8 digit number, circa 1989. This is also a dark red finish and the Dim's seem to have been made in those neon funky colours.
May not be a Mats at all, but if it is a Westie, we know that specs are always "subject to change".
Is there nothing on the head stock??