Big SLR's handheld
Yeah, RB 67.  I own one and have used it hand held with 180mm lens and Ektachrome 100 VS.  Nice camera.  Waist level finder, roll holder, bellows focusing.  It's funny but I also own a Graflex RB Super D in 3 1/4 x 4 1/4.  Nice camera.  Waist level finder, rotating back with roll holders or sheet film holders, Big old SLR mirror, bellows focusing ...
It is funny, but when I see the two cameras side by side it is easy to see a resemblance.
Also many famous photogs such as Dorthea Lange used to use their Graflex SLR's hand held.  Funny how we have come full circle.
Regards,
Dave