This metal Warhammer 40K Rogue Trader-era Space Marine Chaplain was a 1988 sculpt by Mark Copplestone (as per WD108). Part number 410601 originally and later 070133/62.
He can be seen in WD108:
And in artwork in the same White Dwarf issue:
Here’s how he arrived to me:
More pics to come as he’s painted.