In the early till mid 1960's Citizen used its own circular geared rotor in its automatic watches. This is known as the "Jet Rotor". Citizen used this design in their ‘Jet’ and ‘Super Jet’ models. In 1963, they began to replace the Jet rotor with the more common oscillating weight, which proved to be more reliable than the Jet rotor. The first model to use the swinging weight was known as the 'Uniauto' and came in several versions, all with a special logo on the dial and in 17 or 19 jeweled versions.
This is a beautiful Citizen Autodater Uni. The casing is smooth, perfectly shaped with domed acrylic glass. The case is measuring 38mm excluding its crown. The crown has pretty good grip and it is signed with the "Uni" logo.
The dial is slightly curved with darker champagne brown colour. At the dial, it is labelled with a Uni logo, "Citizen" "Auto Dater Uni" "17 Jewels" "Para400Water" "Parashock" Japan.
This watch is equipped with dauphine hands and a long round second hand which sweep smoothly. At 3 o'clock position is the date window.
This Citizen Auto Dater Uni has a snap in back case. The whole case is make of stainless steel. What is interesting is that the back case has a Uni logo marking and also a wording STAR in a rectangle frame. I have tried to find up more about this.
This watch used the Citizen in-house movement of cal. 2410 with 17 Jewels and has an amplitude of 18,000 bph. It has a power reserve of approximately 47 hours.
Below is some reference books for Citizen Uni models........
Citizen Parawater casing construction diagram:
Diagram showing the Parashock system: