Citizen’s 8200 movement and its derivatives was produced for over 30 years – it became their workaday and relatively inexpensive automatic watch, most often seen in the Eagle 7 range. It was Citizen’s rival to the Seiko 5 models. It was first launched in 1976, before the Eagle 7’s hit the shops in the early 1980s. The movement was a simplified 21 jewel design compared to Citizen’s previous calibres, running at 21,600 beats per hour. Often the early 8200 automatics had no model name, but one used the Adorex name, adopted from the 8000 and 8050 high beat movements (28.8k bph) launched in 1974. Unlike the 8200, these two calibres had only a very limited production life as Citizen made quartz watches their priority. The 8000 line was notable for the first use by Citizen of a uni-directional winding rotor, which was sustained by the 8200. For reference, the date only version uses the 8210 movement. My Adorex example is a straightforward, smart looking piece with day and date complications, both of which have quick-set functionality and was made in September 1977 and is running very well and accurately :

More info on this and the other Adorex models can be found here:

https://sweep-hand.org/2014/10/12/the-weeks-featured-watch-62-the-adorex-8200/

https://sweep-hand.org/2013/04/29/this-weeks-featured-watch-50-the-adorex-8000/

https://sweep-hand.org/2014/11/30/this-weeks-featured-watch-65-the-adorex-8050/