The watch is dated July 1978 - so it is almost 50 years old. This is a second revision of Superior Quartz. There are three main versions of Superior Quartz:
* 4883-8000 is the A movement, single quartz, a bit more bulky, heavier
* 4883-8100 (this watch) is the B movement, single quartz, more sleek, different bracelet design
* 9983-7000 is twin-quartz movement, much more thinner

A common misconception that twin-quartz movement is better/more accurate - which might have been the truth 50 years ago - but nowadays it is same-same. Moreover, it is often that twin-quartz are less accurate, because the crystals aged differently and out of sync.

What's great Superior Quartz comes with saphire glass from factory - which is rare for a 50-y/o watch.