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Round black resin digital watch with silver stainless steel case, 42.5mm

CASIO

CASIO W7531-AVCF 42.5mm Digital Watch Black Resin

SKU CH-C5TM-ZJNM7 MPN W7531-AVCF

A 42.5 mm digital sports watch with tide graph, moon phase data, 1/100-second stopwatch, countdown timer, four daily alarms plus snooze, dual time, auto LED light.

  • Watch movementQuartz (Battery)
  • Product shapeRound
  • Display typeDigital
  • Strap materialResin
  • Strap length7
  • Item conditionNew
  • Moon age and phase shown for any day
  • 100 m water resistance suits swimming and surfing
  • Auto LED light with afterglow for night reading
  • 1/100 s stopwatch measures up to 99:59'59.99
  • 4 daily alarms plus snooze keep you on schedule

42.5mm Digital Sports Watch

The Casio W7531-AVCF is a unisex digital watch built around a 42.5mm stainless-steel case and a black resin band. It delivers tide-graph and moon-phase data alongside standard timekeeping, making it suited to coastal sports enthusiasts and everyday wearers who want quick environmental reference on the wrist.

Sustained-use reliability

Quartz movement powered by a CR2025 cell provides approximately ten years of operation before a battery change is needed. The module maintains an accuracy of plus or minus thirty seconds per month, and the 100-metre water-resistance rating holds up during repeated swimming or surf sessions without requiring extra sealing steps.

Pre-purchase checklist

Verify that the 42.5mm case diameter and 7-inch resin band length fit your wrist comfortably. Confirm that the tide-graph, moon-phase, dual-time and stopwatch functions match the specific timing and planning needs of your activity, as the watch does not offer GPS, heart-rate monitoring or smartphone synchronization.

How it compares

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

Price $32.99
Cheaper than about 87% of the 2,679 comparable items (median $130.99).

Specifications

Product
Brand nameCASIO
Model nameW7531-AVCF
Product colorBlack
Item conditionNew
Display
Display typeDigital
Size & build
Size or dimensions42.5 mm
Product shapeRound
Strap materialResin
Strap length7
Case size42.5 mm
Housing materialStainless Steel
Environment & compliance
Water resistanceYes
More details
Watch movementQuartz (Battery)
Suitable forUnisex
Age groupAdult

Questions about this item

Does the CR2025 battery last through years of daily LED backlight use?

The CR2025 cell is rated for approximately ten years of operation, and the auto LED light with afterglow only activates when the wrist is tilted, so normal daily use stays well within that lifespan.

What strap size or tool is needed to fit the 42.5mm case to a 7-inch wrist?

The resin band is supplied at a 7-inch length with a standard tang buckle; no tools are required — simply choose the hole that fits and fasten.

Will the tide graph and moon-phase data stay accurate if I keep my older analogue dive watch as a backup?

Yes — the module 2926 calculates tide graphs and moon age independently using its pre-programmed calendar valid until 2039, so the digital watch remains accurate regardless of any other timepiece you wear.

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