F—91W

Nineteen Eighty-Nine.
Still ticking.

Loop · 01 Made in Yamagata

Casio F-91W in white resin, modded with red LCD digits

Casio F-91W classic black, alarm chrono, water resist 50M

Casio F-91W classic black, blueprint reference

Casio F-91W all-black variant with WR badge

2024

F-91W Resin White

The 21-gram object in summer white. Inverted red LCD, same case, same 7-year battery.

¥1,090 · WR · 21 g

1989

F-91W The Original

Black resin, alarm chrono, water resist 50M. Never redesigned. Still ¥1,090.

¥1,090 · 50M · 21 g

1979

Timex Indiglo

The American answer. Acid yellow resin, Indiglo backlight, same digital DNA.

$24.95 · INDIGLO

CATALOGUE

F-91W Reference

Thin and light design. Digital face. Urethane band. Five lines from the engineering sheet.

SPEC · ALARM CHRONOGRAPH

2019

F-91W All Black

Stealth edition. Black case, black bezel, black band. The same brain, dressed down.

¥1,500 · WR · 21 g

A 21-gram object

An object
that refuses
to age.

Casio's industrial designers in Tokyo finished the F-91W in 1989 and have not touched it since. The mould tools still in use in Yamagata produce the same case, the same buttons, the same green LCD that was first photographed for the 1989 catalogue.

Case: Resin · 33.4 × 35.2 × 8.5 mm
Weight: 21 g, strap included
Movement: Quartz · ±30 sec / month
Battery: CR2016 · 7 years

Document 01 / Origin

In 1989, a 21-gram object left a factory in Yamagata and proceeded to outlive presidents, marriages, smartphones, and the Soviet Union. It is still in production. It has never been redesigned.

Years in production: 37
Estimated units: ~300,000,000
Retail since launch: ¥1,090

Document 02 / The Family

Four watches.
One philosophy.

Nothing in this lineup has been redesigned in three decades. Some objects get it right the first time and the trick afterwards is to leave them alone.

01 2024