Vintage grey plaid blazer

Longline cut with shoulder pads and slight a-line shape around the hips 3 tortoiseshell buttons down the front, 2 of which are concealed Main colour is grey with light blue and yellow threads woven in Seems to have been made by MSM Tailors and the lining says “Boss” No size tag but I’d ca it a modern US 2 or 4, or a small Measures 17” across the back when buttoned up In perfect vintage condition