That is very cool. I have never seen one of those before. I had a rangefinder that I used in the past on my Ansco Speedex Special R but never used a meter like that. My Sekonic has a plastic clip that can be attached so it hooks into the accessory shoe but, though it is a small meter for a handheld, it looks huge on top of the Super Memar.
I'll have to put that one on my wish list! I could use that with my Super Isolette as well.