Mouse and hold - it's Victor Hasselblad and Reinhold Heidecke, the inventors of the respective cameras on display.
But both didn't make the glass, right? :)
Are the new Rolleiflex TLRs coupled? Like the FX and GX? Probably not what the OP is interested in (as they are much more expensive) but just out of curiousity.
The new models don't have the auto index rollers, I think that's too bad, I liked that feature.
sorry, what I meant by coupled, is that the meter on the new Rolleiflex's are linked to the aperture and shutter speed settings.