This is the flash that you can use with the metz 3562 module to get ettl metering with the 6008 and Hy6 cameras. Other SCA-3000 series modules can be fit to use the flash with other cameras. The flash can be mounted directly to the cameras or remotely with a cable.
It comes with the Nikon 3402 foot mounted so it will also work with the Nikon cameras. You would need to change this foot to the Rolleiflex 3562 module to work with your 6008 or Hy6 cameras. This is done by opening the battery door and pushing the blue button and sliding off the foot module and sliding on the Rollei one.
This flash has a blemish in the front of the diffuser which does not appear to affect operation. See second picture. I think if you have it set to the wide angle side the flash bulb is very close to the fresnel and it might have gotten hot.
3562 modules available separately from my site, and is required for eTTL with the 6000 and Hy6 cameras.