Gear box for RHEON gear reducer appears to be for some kind of food processing equipment it is used looks to have been repaired at one time this is from a now closed factory that kept spare parts on the shelf has multiple ratio's the shaft that is opposite the hand crank is 1:1 the shaft below the crank is 1:2 [turns 2 times to one turn of the crank ] the two shafts with the flanges are 20:1  

[Please Look at all the pictures they are part of the description]