Casio Illuminator Heavy Duty Sport Ref. MWD-110H-1AV
Digital Sport/Tool Watch · Casio (Casio Computer Co., Ltd.); high-durability 'Standard Digital' tier, widely regarded for value and 'indestructibility'.
Period: Modern Utility (2020s). It features an industrial, G-Shock-inspired aesthetic with decorative bezel screws and a legible digital layout.

Type
Digital Sport/Tool Watch
Brand
Casio (Casio Computer Co., Ltd.); high-durability 'Standard Digital' tier, widely regarded for value and 'indestructibility'.
Movement
Casio Quartz Module 3517; functions include 1/100-sec stopwatch, countdown timer, dual time, 5 alarms, and a 10-year battery life.
Dimensions
47.2mm diameter, 14.2mm thickness, 50.8mm lug-to-lug, weight approx. 60g.
Description
The MWD-110H is part of Casio’s heavy-duty 'standard' range, often referred to as 'G-Shock lite.' It offers the rugged, angular aesthetic of higher-end tool watches with the impressive utility of a 10-year battery, making it a favorite for outdoor enthusiasts and professional workers alike.
Key Features
10-year battery life, stainless steel bezel, large digital display, and prominent LED 'Illuminator' backlighting.
Dial Description
Positive LED digital display with split-section layout: day/date at top, large central time digits, and an alarm indicator bar at the bottom.
Case Material
Resin case with a stainless steel bezel overlay; matte black finish with metallic accents.
Crystal Type
Acrylic/Spherical resin glass; highly shatter-resistant but prone to surface scratches.
Bezel Details
Fixed octagonal bezel; stainless steel construction with four exposed decorative screws and engraved functional labels.
Crown & Pushers
Four recessed stainless steel push buttons (Adjust, Mode, Start, Light) located at the 2, 4, 8, and 10 o'clock positions.
Bracelet or Strap
Integrated black resin strap with a standard pin buckle; corrugated flexible design near the lugs.
Caseback Details
Solid stainless steel plate secured by four screws; includes engravings of model number, module number (3517), and water resistance rating.
Movement Type
Casio Quartz Module 3517; functions include 1/100-sec stopwatch, countdown timer, dual time, 5 alarms, and a 10-year battery life.
Water Resistance
100 meters (10 ATM/330 feet); suitable for swimming, snorkeling, and light water sports, but not deep-sea diving.
Origin & Provenance
Japanese movement/design; likely cased in China, Thailand, or Malaysia; uses an in-house Casio quartz module.
Age Estimate
Modern production (launched circa 2022-2023).
Cultural Significance
Represents the democratization of 'tough' watches, offering professional-grade durability and legibility at an entry-level price point.
Condition Notes
Excellent/Mint. Visible surface is clean with no scratches on the resin crystal or steel bezel; strap shows no signs of wear.
Value Estimate
MSRP $39.95; Market value $25 - $45 depending on region and availability.
Care & Maintenance
Clean with mild soap and water; avoid chemical solvents. Replace gaskets every 2-3 years to ensure '100M' rating remains valid.
Similar Watches
Casio G-Shock DW-5600 (more durable, shorter battery), Casio AE-1500 (larger display), Casio DW-291H (higher water resistance).
Interesting Facts
Despite not being a G-Shock, this model uses a similar 'hovering' module design for impact resistance and features the same 10-year power cell used in the legendary AE-1200 'Casio Royale'.