Nikkan CR-231 Cornet

This is a cornet manufactured by Nippon Gakki Co., Ltd. (Nikkan), which was Yamaha's wind instrument manufacturing division. The serial number 911121 on the Nikkan CR-231 is estimated to have been manufactured in September 1977.
This model is a long-type cornet made of yellow brass with an engraved bell.

I am not familiar with the details (I have never played it), but the moving parts are not stuck and are operational.

This item has been stored for over 30 years. (It has not been maintained.) The photos show everything.

Thank you for looking.