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Square resin digital watch with dark grey strap and mineral crystal, 38.20 mm case

CASIO

CASIO F-91W-1SDG Digital Watch 38.20 mm

SKU CH-CH8Y-TG4CC

A lightweight resin digital watch with chronograph, LED light and day-and-date display

  • Watch movementQuartz
  • Product shapeSquare
  • Display typeDigital
  • Date displayDate
  • Strap materialResin
  • Closure typeBuckle Clasp
  • Reliable daily timekeeping with quartz movement
  • Durable resin case and strap for everyday wear
  • Clear digital display shows time, day and date
  • Chronograph function measures elapsed time precisely
  • LED light lets you read the display in darkness

Casio F-91W-1SDG Digital Watch

The Casio F-91W-1SDG is a lightweight digital watch built for everyday casual wear. Its quartz movement powers a square display that shows the time, day and date at a glance. The resin case and strap keep the weight low and the feel comfortable on the wrist.

Resin Build with Buckle Clasp

A fixed resin bezel and mineral crystal protect the module from daily knocks and scratches. The integrated resin band fastens with a buckle clasp that stays secure during activity. Splash resistance handles hand-washing and rain but is not intended for swimming or submersion.

Quartz Chronograph Limits

The chronograph function measures elapsed time with standard stopwatch precision. An LED light illuminates the digital readout in low light without a backlight that stays on. Buyers who need water resistance for swimming or a backlit display for constant night viewing should consider other models.

How it compares

Measured against everything we stock in Analog & Digital Wristwatches, at today’s prices. Recalculated every night.

Price $39.99
Cheaper than about 83% of the 2,679 comparable items (median $130.99).

Specifications

Product
Brand nameCASIO
Design styleCasual
Item conditionNew
Display
Display typeDigital
Size & build
Main materialResin
Product shapeSquare
Strap materialResin
Closure typeBuckle Clasp
Bezel typeFixed Bezel
Housing materialResin
Case size38.2 mm
Watch glassMineral Crystal
Environment & compliance
Water resistanceSplash Resistant
More details
Watch movementQuartz
Date displayDate
Suitable forMale

Questions about this item

What does the digital display show, and what functions does the quartz movement drive?

The quartz movement powers a digital chronograph with day and date display plus an LED backlight, all shown on the mineral-crystal screen.

What are the case thickness and band material, and how does the buckle clasp fit?

The resin case measures 38.20 mm thick and pairs with a resin strap secured by a buckle clasp for adjustable wrist fit.

How do you set the time and date on the F-91W-1SDG, and which button sequence is often missed?

Hold the adjust button until seconds flash, use the mode button to cycle through fields, then press adjust again to confirm each change.

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