I think this is from the 1950's. I do not have any keys for these units. Units appear to be unrestored. The unit on the right, the knob for product dispensing moves freely, no resistance.
The knob on the unit on the left turns only a little. Overall, an attractive, vintage piece. Thanks for looking and good luck!The item "Double Chlorophyll Machine 1950s gumball vending candy Vintage" is in sale since Thursday, March 02, 2017. This item is in the category "Collectibles\Banks, Registers & Vending\Vending Machines\Gumball". The seller is "patton8088" and is located in Phenix City, Alabama. This item can be shipped to United States.