Help identifying this lens mount
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)
Leica M2, Nikon D700, Bronica RF645, Leica CL, Summicron 40mm, Rolleicord Va, Hasselblad 500 CM Zeiss Planar, Leica 50mm Summicron V3, Hasselblad PME51 metered prism, Zeiss Ikon Super Ikonta 534/16 & Ensign 820 Special - all gone.