That's a stunner - really like it. It's an 84 and there's some debate over whether it was issued or not. From what I've read these originated out of Hong Kong - if you do a search on MWR (cwc Hong kong) you'll find some info.
Where did you pick it up? There's one on ebay that's been for sale for eons at around £1900
PS first dibs if you ever want shot of it !!!