Help IDing Canon Cinema Lenses

[Michael Panfeld]

Hi: I just acquired a pair of Canon lenses (35mm f1.8 T2.0 and a 50mm F1.2 T1.4) for a song ($400 with shipping). These are in BNCR mount with geared rings incorporated to the focusing mount. They do not say K-35. The serial numbers are 35mm: 12468 50mm: 17078. Both say Canon Camera Co. Japan and CANON LENS on the ring around the front element (which are both sunk well down from the front edge of the aperture mount.

I am trying to identify these. Any clue as to where I might find archival info from Canon. Or perhaps my description and pics will strike a bell.
Thanks