An organ missing from the book 'The Mortier Story' is the Mortier dance organ on display at the Kawaguchiko Music Forest Museum in Japan. The organ was not included in the book because we had no further data on this instrument.
Thanks to Kazuya Serizawa, we obtained the following information: the organ has the serial number 952 and was built in 1924.
What the front originally looked like cannot be said. The organ ended up with Marc Fournier, who rebuilt it twice.
The photo below (taken by Rinus De Wildt, with thanks to Jack Jacobs) shows the organ after its first rebuild:
In the second rebuild, an additional key was added and a midi system was installed. The organ is now on display at the Kawaguchiko Music Forest Museum in Japan (photo serial number: Kazuya Serizawa):
