Rosie's 9-button is a low G. It sure is a pretty one. Larry did a really nice job on it. Moreover, Rosie is a really nice gal.
I think Pat Savant has a Bon Tee with the same black with red harware color scheme, but his is a 10 button. Man-o-man... You wanna talk about some trippy accordions... Pat Savant has had the most bizarre color schemes EVER. Even Sydney Brown made him a blue one back in the 60's that would even make Jim Pettijohn (bravenet radioactive Hohner dude) blush. Just look at the gallery on his web site... holy catfish! http://www.cajuntwist.com/
I'd like to hear a high G. I'll bet you're right, DP, that would be very unique in the realm of C&Z. I can't think of anyone who has recorded with one. If anyone *has*, it would probably be Jo-el Sonnier. The highest-octane-octave I'm familiar with is Wayne Toups, who has a high F. Sometimes I can hit a high F... but only when I'm full of cheap beer, red beans and rice and in a hot shower. Poo-yaie!