This metal Rogue Trader-era Imperial Psycher, Psyker or Astropath (depending on where you look) was one of the first releases for the then-new Warhammer 40K game.
He has “Astropath” on the front and 1987 on the back.
He reappears in the RT601 Adventurers as Astropath Yerl. I spoke with Trish Carden in Jan 2025 and she thinks she was responsible for this sculpt.