This metal Space Marine Terminator is “Marine 3” in the 1991 Blue catalogue and is part number RTB9/3 there.
He’s a 1989 Jes Goodwin sculpt and can be found in the RTB9 Terminators box set.
On the front of the RTB9 box he can be seen at the front with the assault cannon and power fist, and again with the storm bolter and power fist at the front.
On the rear he can be seen with the storm bolter/chainfist and assault cannon/powerfist combos.
