Thomas,

The Crown Graphic is a Pacemaker Speed Graphic without the focal plane shutter. When you see a reference to Graflex, it can be the company itself, or it can be the non-Graphic models they built. For example, the RB Graflex Series D (RB means "rotating back"). These were the SLR type camera which Graflex produced - because of the swinging 4x5 mirror, the bodies were big boxes, and, to clear the mirror, a longer lens was needed. Common on these was the Kodak #34 Anastigmat at around 190mm, where the normal lens for the Pacemaker Graphics was either the 127mm Ektar or 135mm Optar.

Dan