Today's watch is another by one of the more elusive brands, who are quite well known, but their links to the larger watch manufacturer are relatively hidden.
The watch is by Q&Q (or QandQ as I've had to write it in the tags as the & symbol isn't allowed), who are a budget but quality brand started in 1976. The name stands for Quality & Quantity, and the links I've found suggest they were part of the Japan CBM Corporation, which seems to mean Citizen Business Machines - so the watches may be Citizen watches after all.
This model is one of the 80s watch staples - the Ana-Digi, with a main 3 hand dial analogue display and a small 6 digit LCD display at the bottom. The analogue display is operated by a crown, while the 3 buttons operate the LCD. All of the different modes are displayed on the LCD, with the watch having date, dual time, alarm, and stopwatch as options.
The back has the Q&Q logo, and states this has a Japanese movement, but assembled in Korea (and that it has the usual stainless steel back and base metal bezel), with a case that is 30m water resistant.
I don't know exactly when this model is from, but the style was very popular in the 80s, so I'll guess that it is from that era.