Tissot PRX Powermatic 80 35mm Steel and 18K Gold Bezel Unisex Watch

Ref. T9312074103101

The PRX shape traces directly to a Tissot case from 1978, and this two-tone reference sits within the T-Gold line as the precious-metal variant of the 35mm family — distinguished from its all-steel siblings by an 18K yellow gold bezel, which means 75% pure gold alloyed with silver and copper rather than a plated surface. At 35mm with a lug-to-lug of roughly 38.5mm excluding the first bracelet link, this wears closer to the wrist than the numbers alone suggest; the tonneau case and integrated bracelet read as a continuous line rather than a watch sitting on a strap. The gold-tone hands and indices against the silver dial give the two-tone treatment coherence rather than contrast, and the mix of brushed and polished surfaces on the bracelet carries that through to the wrist. The calibre 80.111 inside is worth understanding. Derived from the ETA 2824-2 but slowed to 21,600 vph, it gains an 80-hour power reserve — enough that a watch left on a Friday evening is still running Monday morning. The Nivachron balance spring resists both magnetism and temperature shifts without the need for a soft-iron cage, and the movement is laser-regulated at the factory rather than adjusted by hand. The see-through caseback makes it visible, and it is a movement that rewards the look.

Reference

T9312074103101

Brand

Tissot

Case size

35mm

Case thickness

11.3mm

Lug width

24mm

Case material

Two-tone

Case shape

Tonneau

Dial

Silver

Crystal

Sapphire

Movement

Automatic

Calibre

Powermatic 80

Functions

Date

Water resistance

100m

Bracelet / strap

Stainless steel bracelet

Strap colour

Two-tone

Clasp

Butterfly clasp

Lume

Super-LumiNova

Retailer

Goldsmiths