[Sajen]

Originally Posted by A. G. Maisey

Sorry Detlef, its not two guesses, I am referring to two separate things which can exist either separately, or together.

The longer wrongko mouth because of a need to allow the blade to enter; the sunken gonjo because of age.

Hello Alan,

I only want to confirm that it is in this case the sunken gonjo because of age.

Regards,

Detlef