1966 kawai grands

[amy]

I recently purchased a Kawaii 6' grand, built in 1966 in Japan, which then traveled to Hawaii, then LA, now to me, in Reno. It is a series 600. I know virtually nothing about it except that history. I am interested in finding out any of its particulars; where the hammers were made, what its quirks are etc.
Amelia Currier