According to tibia fandom this item was once spawned in Venore swamp.
I recently asked a question about your location: Where exactly was the spawn location of the Bronze Necklace necklace in Venore? - TibiaQA
However, no one has responded yet.
The story told by the fandom of tibia the bronze necklace was given as a gift from CipSoft as 2nd place by the Tibia Ball League in 2003 at Antica.
Another was rewarded to Mystic Videl for winning the Tibiopedia "Tibian Traveller" contest on August 31, 2009.
Another was rewarded to Sahsy for winning the tibiafriends contest "My Tibia Story" on May 15, 2010.
Another was rewarded to Whinorn Lube for winning the New Year's Lottery sponsored by TibiaTR and TibiaLottery on January 2, 2011.
A bronze necklace was one of the Tibia Ball League awards in 2003.
| de Colar de Bronze TibiaWiki | Fandom
The item is currently found in some player houses,
The item is currently found in some players' houses, the most recent Bronze Necklace was distributed as a prize in a contest held by the site:
GALLERY – Tibia Fanart