VEGA DUAL TIME is a digital wristwatch released by Citizen in 1980.
I think this is actually the first model to introduce a model that has all nine of the "Function" columns in the table above.
However, this does not mean that this model is extremely functional...

Already on our site CASIO A201 or CASIO LD-660、ORIENT DOUBLE FACE we have introduced models called "DIGITAL HANDS" that reproduce analog hands with a digital display, but in the early 1980s, Citizen, like other manufacturers, released DIGITAL HANDS models.
This model is CASIO A201 it is not a type where analog display / digital display can be switched, such as CASIO AE-74 like the DIGITAL HANDS, this model is divided into an analog display area and a digital display area, and is thought to be one of the earliest DIGITAL HANDS models.

This model has Citizen's "VEGA" logo, but you can also see a model (Module 9560) with the "CITIZEN" logo on overseas websites.
The DIGITAL HANDS model was particularly popular overseas at the time, so it seems that export models had the CITIZEN logo to distinguish them from domestic models.

If you use this model to display the time on both the top (analog display) and bottom (digital display), you might end up noticing something you shouldn't, thinking, "I don't even need two," so I recommend using the bottom as a date display.
However, if the time is not displayed at the bottom, the minute hand and second hand are exactly the same, so you won't be able to tell the time just by looking at the photo.(You can't tell whether it's 3:48 or 3:58 just from the photo on the left above.)
However, I believe that making the minute hand and second hand identical is actually a very groundbreaking invention in the history of digital watches.
usually?If so, you would think of setting a segment for the second hand further outside, but in reality, even if the minute hand and second hand are exactly the same (the second hand is always moving), you can tell them apart just by looking at them for a few seconds, so there is not much of a problem in practical terms.
I looked at the English version of the technical manual for this revolutionary method.「BLOCK-SPLIT MULTIPLEX DRIVING SYSTEM」It had such an exaggerated name.
(I don't have the Japanese version of the technical manual, so I don't know how to translate this part into Japanese. Someone please tell me.)

The "ADEC" display on the back cover is sometimes seen on old Citizen watches, but even with the same "VEGA" brand VEGA JETTA etc., the back cover display says "VEGA", so I don't really understand the rules.
I've seen analog watches with "ADEC" on the dial, so I think it's probably one of Citizen's sub-brands, but it's also a mystery that the brand name is different on the LCD and back cover.
By the way, the export model (Module 9560) with the "CITIZEN" logo also has "CITIZEN" displayed on the back cover.