A black mirror dial that hides a full digital display is one of the coolest tricks in Tissot's catalog, and the PRX Digital 35mm in black makes the most of it. Switched off, the face looks like a pool of dark glass framed in polished steel; switched on, it reveals crisp digits and a surprisingly deep toolkit.

The design borrows the PRX case from 1978 and marries it to the digital quartz technology that defined the late 1970s and early 1980s. You get time and seconds, day and date, a second time zone, a chronograph and an alarm, all controlled from the case-side pushers. The black version leans more toward a stealthy, technical feel than the silver, and it pairs easily with dark clothing, denim or a leather jacket.

At 35mm it remains compact and comfortable for most wrists. Sapphire protects the dial, the case is water resistant to 100 meters, and the integrated bracelet can be swapped out in seconds thanks to the quick-release system.

Inside the Black PRX Digital 35mm (Ref. T137.263.11.050.00)

• Case: 35mm stainless steel, brushed with polished bezel
• Movement: Swiss multifunction digital quartz
• Functions: hours, minutes, seconds, day-date, second time zone, chronograph, alarm
• Dial: black mirror finish over the digital display
• Crystal: flat sapphire
• Water resistance: 10 bar / 100m
• Bracelet: integrated stainless steel with quick-release ends and folding clasp

Dark, glossy and clever, it is a conversation starter that still works hard every day.