via this auction where you'll find a ton of pics while up.
"CV and GATE modification was just added...
First came the Odyssey Mk I (Model 2800) produced between 1972-1975. These used a smooth but tiny sounding 2-pole VCF filter design (model 4023) similar to those used in the Oberheim SEM modules. From 1972 to 1974 the Odyssey was produced with a white-faced front panel with black lettering.
During 1974 to 1975 they switched to a redesigned black front panel with gold lettering. However, all Mk I's can be identified by the rotary knob they use for pitch bending. None had any interface jacks, but a factory modification was available to add interface jacks as well as a PPC pitch bender in place of the rotary knob.SPECIFICATIONS:
Serial #282185
37 keys, 2 Oscillators
Filter - 4023, 12 dB/oct.
Pitch bend - Knob
Slider caps - small soft plastic "tic-tacs"
CV/Gate/Trig in/out - NoneOutput high - RCA
Output low - 1/4 inch
Audio in - None
Pedal Input - 1/4 inch
Portamento footswitch input - 1/4 inch
Power cord - attached
Power switch - on control surface, small, lighted
23" wide
18 1/2" deep
6 1/4" high (add 1/4" for feet)
Approx. 16 lbs. (without carrying case)"
