The poor quality control of this chapters antiquity leads might continue. I've ran into a dead end trying to farm those two leads a 2nd time:

"Rune-carved comb"-lead for the music box. I've been grinding those Telvanny daily quests like crazy since Necrom release and the comb lead wont drop a second time (yes, I completed the music box the first time). I'm doing the quests with multiple chars every day. The other lead locked behind those daily quests for the mythic item dropped multiple times already but the comb for the musicbox only that one single time for the first completion.

"Ebony Shalk Mounting" for the Velothi Ur-Mages Amulet mythic. I killed this worldboss SO many times, yet alone by grinding the dailies for the comb lead, but it doesnt drop a 2nd time. Its the only worldboss-lead from the Necrom chapter that didnt drop a 2nd time. I'm strongly suggesting that it might be bugged.

Also shoutout to the bugged Apocryphic Well leads, where I've spent close to 35 million gold on PS EU for treasuremaps (for comparison: equals about 120-150 million PC-gold), just to read on the final PTS-patchnotes for U39 that those leads are bugged. All this gold was spent for nothing and the customer supports' answer basically was: yes the leads are bugged but we can't reimburse the gold cause the bugfix is on the PTS and not on the liveservers. We're sorry for all the effort you went through farming & acquiring that gold.

Antiquities truly have become one of the worst features in this game and are a completionist's nightmare nowdays.