This guy was Dimshade and Thaw in the early days and was later shown in the catalogues as Chainsword 1, part number 070119/22. He is a Bob Naismith sculpt, and shares most of his head sculpt with Breakout Con. It looks like 1987 on the tab.
You can see him in WD93:
Pingback: List of metal Space Marine (and other) models – nostalgia force! – Angry Griffin
Pingback: List of metal Space Marine (and other) models – nostalgia force! – Angry Griffin