OK, I managed to find my copy of #270. Here are the details (I hope Erik doesn't mind, I tried not to be too specific):
Each suit of armor bears a powerful curse, appropriate to the Abyssal Lord who comissioned it.
The Battlemonger (Yeenoghu): crude suit of battered lamellar armor, Mongolian in design. Exudes stench; gnolls, ghouls, and ghasts will not harm the wearer; grants additional proficiency with wielded weapons. Curse: wearer must feed on humanoid flesh or go berserk.
The Black Prison (Graz'zt): ebon black full plate, Draconic design. Grants stealth, immunity to poison gas, drowning; blindsight; wearer does not need to eat, drink, or breathe; wearer regenerates, can use draconic fear aura. Curse: cannot be removed as long as the wearer is alive, drives wearer insane.
The Horned Casque (Baphomet): bronze spiked platemail, looks like a minotaur (d'uh). Wearer gains some minotaur traits, can charge and gore, charm minotaurs, summon the Brazen Bull once per week. Curse: wearer must attack gnolls or ghouls on sight; if wearer attacks minotaurs or shows cowardice, armor spikes turn inwards and impale wearer. Functions only for males.
The Immolator (unknown): scarlet, gold, and orange o-yoroi (treat as splint mail). Wearer is shed in flames, can throw fireballs, use several other fire spell-like abilities (including chariot of Sustarre). Curse: wearer becomes a pyromaniac.
The Infinite Panoply (Fraz-Urb'luu): chages appearance at every sunrise, irrespective of owner's wishes. Wearer is immune to illusions and protected by nondetection; glamered; retributive (both attacks and spells); several SLAs. Curse: will vanish at the critical moment for its wearer.
The Juggernaut (Orcus): 12' tall exoskeleton made of different bones (topped with a nalfeshnee skull helmet). Wearer enters harness and a bone proboscis penetrates his skull, allowing him to command the exoskeleton mentally. Wearer gains some undead immunities and resistances, undead won't harm the wearer and he can command them; can use bonebreath once per day. Curse: wearer is exhausted after using the armor, each use drains hit points permanently. At zero hp, user is transformed into a ju-ju zombie.
The Lady's Favor (Zuggtmoy): dirty, stained leather armor. Wearer is immune to plant, mold, and fungus-based attacks and effects; corrodes metal like a rust monster; several spell-like abilities. Curse: when donned, make a save or be infected with Lady's Favor (Abyssal mold). If infected, wearer loses 1 Cha per week until dead.
The Lavashu (Juiblex): living symbiote, looks like a 3' ball of viscous tar, envelops host (leaving only hands, eyes, ears, and nostrils uncovered). Grants electrical immunity, freedom of movement, cushions falls; weapons that strike the host stick in the tar. Curse: host cannot remove it. Lavashu is intelligent and CE, attempts to seize permanent control of the host.
The Pelagic Aegis (Dagon): golden greaves and vambraces engraved with sea monsters. Grants immunity to water-based attacks, water breathing, freedom of movement underwater, regeneration while in water. Also gives water creatures ability to function on land indefinitely. Several SLAs (including Dagon's curse). Curse: air-breathers become unable to breathe air, water-breathers are transported to Dagon's court in the Abyss.
The Raptor Cuirass (Pazuzu): winged and taloned breastplate. Wearer can fly, strike with poisoned talons, has several SLAs. Curse: wearer's bones become hollow (Str -1) every week until wearer collapses into a jellyfish-like mass and dies.
The Rime Guard (Kostchtchie): crystalline ice platemail with polar bear headdress. Wearer is immune to cold and resistant to fire; can walk on snow and ice as on normal ground; temperature is lowered around the armor; several SLAs (including frostfreeze, i.e. flesh to ice). Curse: lycanthropy (CE, polar bear).
The Spiderspawn (Lolth): adamantine chainmail (with spidersilk and rubies). Unaffected by sunlight, wearer is immune to poison and always strikes first in a round. Several spidery SLAs, including the ability to polymorph into a myrlochar. Curse: nondrow wearers are hunted down, drow wearers who displease Lolth are transformed into driders. Powers function only for females.
The Wizard Ward (Demogorgon): emerald scalemail hauberk (resembling snakeskin). Bestows magic resistance, serpentfolk won't harm wearer; can be worn by wizards; wearer can charm serpent creatures, cause scales to flash like a robe of scintillating colors. Wearer can produce a spellwhip (drains spells in addition to damage) 3/day. Curse: wearer gradually transforms into a serpent.