Minolta Autopak 600-X

(1971) 38mm (f2.8), with four elements in three groups, zone-focusing lens. Dual speeds of 1/45 (for flash) and 1/90.  Aperture set by CDS meter from f2.8 - 22.  Close focusing to four feet.  Takes Magicubes -- which are controlled by the meter.  Uses a 640 battery.