Petrof Model III Mahogany Polish Grand Piano March 29, 2016 admin 6' - 7' Length, Brands, Grand Pianos, Petrof Petrof Model III – Mahogany Polish Serial Number: 565028 Finish: Mahogany Polish Size: 6’4″ Warranty: 3 Years Other pianos you might like...Kawai NS-10 Upright PIano Kawai NS-10 Serial Number: 1510749 Finish: Ebony Polish Size: 50" Warranty: 5 Years Bosendorfer Model 200 Grand Piano Bosendorfer Model 200 Serial Number: 27972 Finish: Ebony Polish Size: 6'7″ Length Warranty: 5 Years ❮ ❯