# Casio F105W-1A Review by A.I. WatchMetrics

## Watch Summary
The Casio F105W-1A is a lightweight, rugged Tough Solar analog-digital tool watch suited for active lifestyles and budget-conscious adventurers, boasting a black resin case with fixed bezel, world time across 29 cities, five daily alarms, 1/100-second stopwatch, countdown timer, perpetual calendar to 2099, and electro-luminescent backlight, all powered by the reliable Module 3197 solar quartz movement offering up to 6 months in power save mode.

## Overall Watch Rating: 5.8/10.0

**Functions Metric (9.5/10.0)** - Packs an extraordinary number of practical features like 29-city world time, five alarms, stopwatch, and timer into a sub-$100 watch, surpassing many mid-tier multifunction models.

**Versatility Metric (8.8/10.0)** - Seamlessly transitions from daily casual wear to sports and adventure activities with its 100m water resistance, solar power, and lightweight resin build, akin to higher-end field watches.

**Complications Metric (7.5/10.0)** - Delivers solid digital complications including a precise stopwatch and world time functionality, comparable to more expensive Casio and Citizen analogs.

**History & Innovation Metric (7.0/10.0)** - Benefits from Casio's pioneering legacy in quartz and solar technology since the 1970s, establishing reliable tough functionality like established Japanese brands.

**Movement Metric (6.5/10.0)** - The Tough Solar quartz module offers excellent accuracy (±30 seconds/month) and indefinite power with light exposure, matching the dependability of standard Seiko quartz calibers.

**Brand Metric (5.3/10.0)** - Casio delivers consistent mid-tier reliability and value in tool watches, on par with Citizen for everyday durability without luxury pretensions.

**Dials & Design Metric (4.0/10.0)** - Functional black analog-digital layout with clear legibility via EL backlight, but lacks visual flair or premium execution seen in even basic Hamilton designs.

**Material Metric (2.0/10.0)** - Relies on basic resin construction with resin crystal offering scratch-prone protection, typical of entry-level plastic sports watches like older Timex Ironman.

**Rarity Metric (1.2/10.0)** - Ubiquitous production and low retail price make it as common as other mass-market quartz models from Casio or Timex.

## Total Performance Score (TPS): 4.2

## WM Collector Grade: C+

## Performance Insights: Dominates in functions and versatility for unbeatable tool-watch utility, offset by basic materials and design, providing solid bang-for-buck well under its $285 implied price.

## TPS Interpretation: Good Value: Delivers feature-packed solar performance and ruggedness that rivals pricier quartz tools at a steal.

## Watch Data
[https://www.casio.com/content/dam/casio/us/watches/product_images/standard/F105/F105W-1A_main.png] - F105W-1A; [N/A] - N/A; [N/A] - N/A; [Tough Solar World Time] - Tough Solar World Time; [Casio] - Casio; [F105W-1A] - F105W-1A; [Japan] - Japan; [https://www.casio.com/us/watches/casio/product.F105W-1A/] - https://www.casio.com/us/watches/casio/product.F105W-1A/; [N/A] - N/A; [Solar Quartz] - Solar Quartz; [Module 3197] - Module 3197; [# Secondary] - 55; [Lightweight resin Tough Solar analog-digital watch with world time, alarms, stopwatch, EL backlight, and 100m WR] - Lightweight resin Tough Solar analog-digital watch with world time, alarms, stopwatch, EL backlight, and 100m WR; [42.1] - 42.1; [48.5] - 48.5; [11.0] - 11.0; [22] - 22; [100] - 100; [6] - 6; [N/A] - N/A; [EL Backlight] - EL Backlight; [0] - 0; [Resin] - Resin; [Resin] - Resin; [Resin Fixed] - Resin Fixed; [Resin Screw Lock] - Resin Screw Lock; [Button Operated] - Button Operated; [Resin] - Resin; [Round] - Round; [Black Analog-Digital] - Black Analog-Digital; [Yes] - Yes; [Yes] - Yes; [Yes] - Yes; [No] - No; [Yes] - Yes; [No] - No; [No] - No; [Yes] - Yes; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [Yes] - Yes; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [Yes] - Yes; [Yes] - Yes; [Yes] - Yes; [Yes] - Yes; [No] - No; [Yes] - Yes; [No] - No; [No] - No; [No] - No; [No] - No; [No] - No; [4.2] - 4.2; [C+] - C+; [285] - 285;

**A.I. WatchMetrics Review v37.4 Grok 4 Fast. December 19, 2025.**