I've been looking for the apple variety "Indo" that was used in the Japanese breeding program. The cross Indo X Golden Delicious has yielded several noteworthy Japanese apples, namely Mutsu, Orin Korei and Shin Indo amongst others.

All I've managed to find out about Indo is that it's a 20th Century variety presumably from the Netherlands. Indo is not to be found anywhere, it's not in GRIN and it's not in Botner's collection either. I find this puzzling given that it seems a good breeding stock apple. I was looking for it for my breeding experiments.

Any help on finding this variety would be greatly appreciated.

Thank you.