Knabe Grand Piano October 4, 2017 admin 5' - 6' Length, 6' - 7' Length, Brands, Grand Pianos, Knabe Knabe Grand Piano Serial Number: 103935 Finish: Walnut Satin Size: 6′ Warranty: 1 Year Other pianos you might like...Yamaha C3 Yamaha C3 #5550388 Yamaha C5 Grand Piano Yamaha C5 Serial Number: 6317933 Finish: Ebony Polish Size: 6'7" Warranty: 5 Years ❮ ❯