The above photographs show the keywork of a Muramatsu Silver Flute which is constructed with closed hole keys.
Open Hole keywork tends to be the most popular choice particularly on high quality flutes. Student flutes with either open or closed holes are easily obtained
For more information on this subject go to The
FAQ on the Larry Krantz Web Site
The above photograph and notes are as accurate as my knowledge of the subject permits
If anything above is factually incorrect, or if anyone can usefully improve or add to the above notes then please feel free to email me at john@fluteweb.net