Help identifying this lens mount

[CharlesDAMorgan]

Popped in to my dealer today, before selling me a Rolleiflex 2.8F, he brought out this Angenieux 9.5-57mm 16mm cine zoom. He knows I want to convert something interesting to use with mirrorless. He has no idea what it is or worth, and is selling it for a customer who inherited it and equally has not a clue.

I thought I'd be able to work out the mount pretty quickly, but the three flange is absolutely baffling - any ideas welcome! The third photo shows it was used in Swedish Radio (a lens for Radio umm)

 

[Phil_F_NM]

Looks like a B4 mount. It's a TV mount, mostly for location ENG and it won't cover even 16mm 3:4 so on a mirrorless it will vignette mechanically.
Phil Forrest

 

[CharlesDAMorgan]

Thanks Phil - very helpful. Not one for me then!