Yamaha UX50B1 Upright Piano March 22, 2018 admin Upright Pianos, Yamaha Yamaha UX50B1 Upright Piano Serial Number: 4696573 Finish: Ebony Polish Other pianos you might like...Yamaha YU1 Yamaha YU1 #5954932 Yamaha G1 Grand Piano Yamaha G1 Serial Number: 4790506 Finish: Ebony Polish Size: 5' Warranty: 5 Years ❮ ❯