As apposed to the Marlin being the water resistant manual men's watch series of Timex the Mercury is the non-water resistant men's watch series of TIMEX. They are easy to recognize because TIMEX is the only mark printed on the dial. They contain a TIMEX Model 22 or 24 movement (no date), a M25 movement (calendar) or a M27 movement (day-date) and were marketed as one of the more traditional watch series of TIMEX. Like the Sportster (small water resistant) and the Petite (small non-water resistant) series

TIMEX Mercury Day-Date 'Barcode' ref. 16860 from 1974

Although most TIMEX Mercury watches are traditional I find them very stylish and perfect to wear as a dress watch under a suit or your smart casual wear. Looking at my TIMEX watch collection they are somewhat underrepresented. I guess I am more into that funky sporty 70's design with bright colours, unusual case shapes and sturdy diving or other bezels.

Timex US Catalog 1977