Osawa / Bell & Howell macro / non-macro 35-70mm F3.5-4.5

Osawa was a minor Japanese manufacturer, associated with Mamiya, and with Bell & Howell.
The 35-70mm two ring zoom f3.5-4.5 is found both with and without a macro mode. The one in pics 1, 2 has the macro mode and has a Bell & Howell nameplate. Pic 3 is a non macro one with Osawa nameplate and mamiya mount.

filter: 55mm (non macro version can be 52mm);
aperture: f3.5 - f16, half stop clicks;
iris: 6 blades;
CFD (outside of macro mode) : 0.8m/2.7' ;
Macro: max 1:3.7 at 70mm, distance from lens front approx 21cm.
Focus: ~ 110° rotation,
length: ~ min ~65mm at 70mm, infinity focus; max ~ 90mm at 35mm, min focus;
Weight: ~380g