Toyo 4 3/4 x 6 1/2 field camera

I have acquired a very nice Toyo 4 3/4 x 6 1/2 field camera. It is a metal fold-up camera painted in a

hammertone grey glossy finish. A very classy looking piece of equipment. I understand that the 4 3/4

x 6 1/2 film size is British half-plate. Well, the camera came with a nice removable Toyo 4x5 revolving

back, so I can use it. Another cool thing is that it uses Graphic lensboards (Crown Graphic, Super

Graphic). It seems Toyo actually acquired the rights to build the Graflex Super Graphic and built them

from 1979 to 1985.

Anyway, I have heard that a 5x7 back was available for this camera? Is that so? Any thing anybody can

tell me about my camera would be appreciated.