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...Petrof Model III Mahogany Polish Grand Piano Petrof Model III - Mahogany Polish Serial Number: 565028 Finish: Mahogany Polish Size: 6'4" Warranty: 3 Years Yamaha U3H Upright Piano Yamaha U3H Serial Number: 2671645 Finish: Ebony Polish Size: 52" Warranty: 5 Years ❮ ❯