Yamaha U1 Upright Piano April 10, 2017 admin 48" Height Uprights, Brands, Upright Pianos, Yamaha Yamaha U1 Serial Number: 2370964 Finish: Ebony Polish Size: 48″ Warranty: 5 Years Other pianos you might like...Yamaha U1 Yamaha U1 #3925126 Conover Cable Upright Piano – Oak Oak Conover Cable with 5 Year Warranty. Beautiful condition with an excellent tone and action. ❮ ❯