"It is marked as a "Graflex" and it is a copal 0 and it has a 135 mm Optar lens."
if it has 10 aperture blades, it's a rebadged Wollensak Rapax shutter
if it has 5 aperture blades, it's a rebadged Kodak Supermatic shutter
John is right about '0' being X-synch
have fun with it.