Found black tuxedo jacket, size 42 with 'Elegant Attire' label and collar stain near Charles River in Cambridge.

I found a black tuxedo jacket while walking near the Charles River in Cambridge last weekend. It looks like it was left behind after a formal event as there was a small stain on the collar. It’s a size 42 and has a label that reads 'Elegant Attire.' If you think it’s yours, please reach out with some details about the jacket.