Excellent, Bruno! I have similar documentation that I have been using and I am anxious to make some comparisons. I did not post this link yet because I was trying to figure out its implications, one of which appears to be that Suzuki melodions are developed and manufactured by the Tokai Gakki Company, but I am checking on this with some Japanese contacts. Tokai Gakki developed and (initially) produced the Yamaha pianicas. In one of its old brochures, Tokai Gakki claimed to have invented the pianica. When I asked them, their representative said this was not quite right, but that they had developed the pianica and made them for Yamaha, though Yamaha now does it independently.