This is a Nikkan alto horn, the predecessor to Yamaha. Overall length: approx. 510mm, Bell size: approx. 180mm. A Nikkan mouthpiece is also included. I believe the piston action is smooth. There are a few dents, please judge from the photos. I polished some parts and they shined, so I think it would be good to have it overhauled or polished further. There is an engraving "No2A 6701127", so I believe it was made in 1967. A case is not included. I am an amateur, so I cannot guarantee anything. Please only purchase if you understand this. Nikkan Nippon Gakki Yamaha YAMAHA Wind instrument Wind ensemble