Gold Yamaha Bb trumpet with initials

I lost my Yamaha YTR-2330 Bb trumpet yesterday around 3pm near the Acropolis Museum on Dionysiou Areopagitou Street. It's a full-size gold lacquer trumpet with a small dent near the bell and the mouthpiece stamped Yamaha; my initials 'A.F.' are engraved on the case. I learned in the university band, and it has sentimental value; I really hope it turns up soon.