destroyed collar is a slave collar that has detonated, and can be used as a necklace of sorts that appears that the wearer attempted (and failed) to take it off, judging by the decapitated head and the nearby wrench.
The collar, when worn, has zero DT, and no in-game effect except for being visible as a bulky metallic collar on your character with no visible differences to a functional collar.
It is obtained when you start the Brotherhood of Steel story line but is removed after the first quest you do for them. It can also be found on a corpse labeled "
Man" in the westernmost corner of a ruined building at Freeside's East Gate near Jacob Hoff and across from Mick & Ralph's, which is part of the I Could Make You Care quest line, if choosing the rangefinder.
It leaves one to wonder how this particular collar did not completely explode. For instance in
Fallout 3, the collars were un-lootable and could not even be seen on the corpse visually once they detonated.
Power armor Broken power armor · Remnants power armor ( Gannon family Tesla armor) · T-45d power armor ( Brotherhood T-45d power armor, ) Scorched Sierra power armor · T-51b power armor ( Brotherhood T-51b power armor) Other armor Armor of the 87th Tribe · ( Assassin suit ) Stealth suit Mk II · Chinese stealth armor · Combat armor ( Combat armor, reinforced, Combat armor, reinforced mark 2, , US Army combat armor Van Graff combat armor) · Desert Ranger combat armor · Joshua Graham's armor · Leather armor ( , Lightweight leather armor, Gecko-backed leather armor Gladiator armor) · Leather armor, reinforced ( ) Gecko-backed leather armor, reinforced · Marked patrol armor · Marked scout armor · Marked tribal armor · Marked trooper armor · Metal armor ( , Lightweight metal armor ) Gecko-backed metal armor · Metal armor, reinforced ( ) Gecko-backed metal armor, reinforced · Raider armor ( ) Tribal raiding armor · Recon armor ( Broken recon armor) ( Christine's CoS recon armor) · ( Riot gear , Advanced riot gear ) Elite riot gear · ( Sierra Madre armor ) Sierra Madre armor, reinforced
Headwear Atomic-valence tri-radii-oscillator · Bandana · Beret ( 1st Recon beret, Boone's beret) · Boomers cap · Boomers hat · Boomers helmet · ( Breathing mask ) Ulysses' mask · Caleb McCaffery's hat · Centurion helmet · Chalk's headdress · Combat helmet · Construction hat · Cowboy hat · Dapper gambler hat · Destroyed collar · Destroyed party hat · Explorer hood · Explosive collar · Fancy gambler hat · Fiend helmet ( Fiend battle helmet, Fiend warrior helmet, Motor-Runner's helmet) · Gannon family Tesla helmet · General Oliver's hat · Great Khan spike helmet · Head wrap · Hockey mask · Jessup's bandana · Legate helmet ( , Marked beast eyes helmet , Marked beast face helmet , Marked beast helmet ) Marked beast tribal helmet · Metal helmet ( Metal helmet, reinforced) · Motorcycle helmet · Police hat · Park ranger hat · Party hat · Pre-War baseball cap · Pre-war hat · ( Riot gear helmet Ranger helmet, , Desert Ranger combat helmet , Advanced riot gear helmet ) Elite riot gear helmet · Prime helmet · Prime decanus helmet ( Recruit decanus helmet, Veteran decanus helmet) · Raider helmet · Ranger hat ( · Rebreather · Remnants power helmet · Salt-Upon-Wounds' helmet · Salvaged power helmet · Sheriff's hat · Slave scarf · Suave gambler hat · Stylish gambler hat · T-45d power helmet · T-51b power helmet · Trooper helmet ( Goggles helmet, MP trooper helmet) · Valence radii-accentuator · Vance's lucky hat · Vexillarius helmet · Vikki's bonnet · Welding helmet · White Glove Society mask · White mask Eyewear Authority glasses · Biker goggles · Eyeglasses · Reading glasses ( Dr. Klein's glasses, ) Dr. Mobius' glasses · Sunglasses ( Lucky Shades) · Tortiseshell glasses