A "hapless musician" left his friend's prized violin on a train in Bern, Switzerland, AFP reports.
The musical instrument turned up at a Swiss lost-property office two days later.
On Friday, a man left a Stradivarius violin — "possibly worth several million euros," the AFP reports — on a train. He had been borrowing the violin from a friend so he could play it at a birthday party.
Train staff searched for the lost violin and found nothing.
Surveillance cameras then spotted a passenger walking off with the almost 300-year-old violin at a different station. The police then launched an appeal for help.
On Sunday, the violin was turned in to a lost-property office in Bern.
Police didn't disclose the names of anyone involved, nor the value of the instrument.
"Around 600 violins made by Italian master craftsman Antonio Stradivari are still in existence. One fetched about 11 million euros ($13.5 million) in a 2011 charity auction for victims of the Japanese tsunami," AFP reports.
In 2008, an American violinist left his $4-million Stradivarius in the back of a New York cab. The cab driver returned the violin to its grateful owner, who then thanked the driver with a private concert for 50 cab drivers.