arriflex time lapse motor, very vintage

[Michael Leake]

I would like information if anyone has some on:

an Arriflex time lapse motor manufactured by 'Camera Equipment Co., New York City, model 440-A and Motor controller Model 440.  I purchased on eBay. It was a very good price.

If there is someone who has used one of these, can you let me know  How they work.  What I know from plugging them in is:

It appears to have 2 speed, 4 frames per second(marked ¼ on the motor) and 2 frames per second(marked ½ on the motor).

I am guessing at this..It may a continuous 4 or 2 frame per second setting as there is a switch marked 'stop motion or continuous' on the motor 

controller box.  There may be a timed iris/shutter cover for the lens which co-ordinates with the time lapse, but I did not get that devise.