By the time the nearly 3,000 glasses were filled to the right level, the water had already started to evaporate, making them off-key.
“We tried it with plastic wrap, to cover the surface, and we found out that a light oil ... creates a layer on top that preserves it, and then there is barely any evaporation,” Braun explained.
The team also had to make sure that the mallets attached to the model train did not shatter any of the 2,840 wine glasses, set up to play 20 different classical tunes including Johann Strauss's Radetzky March and Ludwig van Beethoven's Für Elise.
“This world record is a mega-record. It won't be beaten any time soon, I'm certain of that,” Braun said.
It's not the first time that the museum has made it into the Guinness World Records. It also boasts the world's largest model train set, with a total track length of 15,715 metres.