The owner of an unlocked car in eastern Massachusetts discovered a diamond ring with a note hinting that it was given at random by someone with a broken heart.

A 37-year-old Northborough, Mass., man discovered the three-diamond ring with the note on the seat of his car at a train station in nearby Westborough, Mass., on Wednesday, Dec. 7, the Westborough News reports. The communities are located about 30 miles west of Boston.

According to the newspaper, the ring was placed in a box, topped with a small white bow, and contained a note saying:

“Merry Christmas. Thank you for leaving your car door unlocked. Instead of stealing your car I gave you a present. Hopefully this will land in the hands of someone you love, for my love is gone now. Merry Christmas to you.”

The man called police four days later to report the incident after he had the engagement-style ring appraised for $15,000, Westborough police reportedly said.

The ring is a white-gold band holding one large diamond and two smaller diamonds, the newspaper reports. Each diamond is surrounded by a circle of smaller diamonds.

Westborough police believe it was a random incident, the newspaper reports. Police refuse to identify the lucky recipient, who has decided to keep the ring.

JCK