I had the opportunity to handle this Seiko Quartz recently. Movement and case number is 7N42-6A00 and from its serial number, I gather that it was made in the early 90’s.
This watch has a traditional diver design. The dial is inscribed with the words "QUARTZ" and "SQ" which are no longer found in today’s Seiko watches. It has a cyclops over the date window on the crystal. The crown is quite small but surprisingly, it’s a screw-in crown.
I don’t know much about these quartz so here’s a quick shot for your viewing pleasure:
Click on the thumb to see a larger image.