Not for the Leica Visioflex. I've got a Visioflex LTM. I had one of these finders on an Exact VX. Could be used on most of the models. Yours is an early version that may not fit on the later Exacta models as thee were minor spec changes making later finders a little loose on the earlier bodies.
Leica Visioflex ==> That is what I was thinking of. Thank you. I knew I was not imagining it.
Warning!! Handling a Hasselblad can be harmful to your financial well being!
Nothing beats a great piece of glass!
I leave the digital work for the urologists and proctologists.