Imperial dreadnought suits, aka Imperial battle armour, mech suits, or mech armour, available to most Imperial forces in the Rogue Trader era; designed by Bob Naismith for Citadel Miniatures:
"Dreadnought: Blood Angel chapter," from Warhammer 40,000 Rogue Trader, 1987
3 suits of dreadnought armour with order guide, from White Dwarf 95, November 1987; £3.50 each; when ordering direct you could specify the desired weapon arms, body style, and legs; the 40mm square base was standard
2 examples of dreadnought armour painted by Paul Benson, with additional details from 1/35 scale WWII plastic model kits, from Book of the Astronomican, 1988
Also from Book of the Astronomican, these appear to be the same 3 suits from WD95, now with additional painted details to liven up the large panels













