This guy is part number 010105603.

This guy is part number 010105603.
This guy is part number 010105602.
He appears in the 2006 catalogue – not sure exactly when he was sculpted.
De-biked:
This guy was part number 99110101321.
This is the later Terminator Chaplain – part number 99060101315.
No tab on this one! Unfortunately he’s missing his left arm, too, which I will have to source.
In the 2006 catalogue he’s shown with his body being part number 9947010131501, with his arms being part 9947010131502. He has an accessory sprue 994701010131503, which I’m not sure is present on this mini.
This guy is part number 0808/2 and was one of three special weapons Marines sculpted in the year before 2nd. Edition.
The 1993 catalogue which shows them says that the miniatures on that page are designed by Jes Goodwin and Normal Swales – not sure if it was a joint effort or whether one did the Devastators also shown and the other the special weapons.
Says 1992 on the tab!
Designed by Jes Goodwin. It was announced in White Dwarf 182 (Feb 1995). The example in the WD issue is painted up as the third dreadnought of the 2nd. Company.
The right arm had a Multimelta (0425/3), a Twin Lascannon (0442/22), an Assault Cannon (0427/16) as options. The left a missile launcher (0442/23 with front 0442/24) or a power fist (0425/5 with fingers 0425/6).
A variety of Dreadnoughts were shown in WD205:
This is one of the three Rogue Trader Grey Knight Terminators (No.2), and is part number 070243/5.
This is the jump pack which came with the 2nd. Ed. Space Marines.
This guy is one of three Grey Knight Terminators from Rogue Trader and is part number 070243/6.