In 2010 some yabbo stole it. By the time they caught him (8 years later), he had sawed it into small pieces and sold it off as he needed gas money.
It was known as "gold bar #27" and there were no casting marks or assayer's stamps on it, which gave them to believe it was "off the books" and being smuggled.
The press reported it weighed 74.85 ounce but nothing I've seen mentioned whether that weight was in ounces Avoirdupois or ounces Troy, which makes a difference because a Troy ounce (traditionally used for weighing precious metals) is heavier by a little more than 9%. IIRC, it was 16.5 karat and spot today is $4000 and change so -- if it was 75 Troy ounces of 16.5k -- today the gold would be worth $200,000 and change. Ounces Avdp would be more like $188,000.
It's value was a sticking point at the trial of the thief because the museum people wanted to lump in a about $300,000 on top of the value of the gold itself for its artistry and historicity. Insurance only paid a little over $100,000.
Anyhow, AFAIK, the museum never replaced it in the exhibit.