Japanese consumer-electronics manufacturer Casio was founded by Kashio Tadao in 1946 as Kashio Seisakujo. The then-struggling Tokyo sub-contractor initially produced microscope parts, but the arrival of one of Kashio’s younger brothers, Toshio, brought a new spark of inventiveness to the start-up. Its most famous early product was born of the scarcity of cigarettes following World War II. This was the yubiwa pipe, which was basically a finger ring with a mouthpiece that allowed smokers to puff away for longer than if they had to hold the burning cigarette between their unprotected fingers.

The yubiwa pipe was a big hit in postwar Japan, and profits from the device funded the company’s foray into calculators in the 1950s and ’60s. But it wasn’t until 1974 that Casio would enter the wristwatch market. Its debut product was a digital chronometer called the CASIOTRON, which displayed hours, minutes, and seconds on an LCD screen. Improvements to the display followed in 1978, and in 1982 Casio even released an analog wristwatch, the AQ-500. But its biggest splash in wristwatches came in 1983, when the G-SHOCK hit the market.

Distributed for its first few years mostly in the United States, where the bigger and bulkier wristwatch was accepted almost immediately, the G-SHOCK bucked the trend toward thin timepieces. In fact, in 1985, Casio released its own super-thin wristwatch, the PELA, which was 3.9mm thick, weighed a mere 12 grams, and was molded in one piece, watchband and all. But today, it’s the sporty G-SHOCK that people remember. For Casio collectors, some of the most sought-after G-SHOCK wristwatches are the Frogman and models designed by Dee and Rickey, who put their Lego-inspired, hip-hop-infused stamp on the phat timepiece.


Best of the Web (“Hall of Fame”)

National Watch and Clock Museum

National Watch and Clock Museum

This virtual museum, created by the National Association of Watch and Clock Collectors, lets you stroll through tim… [read review or visit site]



Clubs & Associations

Discussion Forums

Other Great Reference Sites

Most watched eBay auctions    

Casio Edifice Tough Solar Bluetooth Eqb-500 Mens WatchCasio Edifice Tough Solar Wave Ceptor Ecw-m300e Mens WatchOld Vintage Casio Chronograph Alarm QuartzCasio G Shock Gw-6900b Solar Waveceptor Digital Alarm Chronograph Mens WatchCasio G-shock Rangeman Burton Gw9400btj-8cr Limited Edition Carbon Fiber Band Casio G-shock Gw9400-1 Rangeman Military Black Triple Sensor Atomic Watch Casio Men's Mtgm900da-8 G-shock Stainless Steel Tough Solar Digital Watch AtomicGents Casio Illuminator 5028 Moon Phase Digital Wristwatch - P17Casio G ShockCasio Edifice Wave Ceptor Tough Solar Ecw-m300e Mens WatchCasio Edifice Ef-547 Mens WatchCasio G Shock G9000ms Mudman. ExcellentCasio G-shock Men's Digital Black Resin Military Mudman Watch G-9010Casio G-shock Gw-m5610-1er Tough Solar Radio Controlled Watch.Casio G-shock Mens Chronograph Alarm Black Red Watch Ga-100-1a4erVintage Casio Remote Control Alarm Chronograph Watch 1028 Cmd-10 Japan MCasio G-shock Gwm5610r1jf Wrist Watch For Men*jcr_m* Casio Edifice Chronograph Ef-503d 41mm Quartz On Box *unused*Casiotron 01-504 1970s Casio Quartz - Vintage Digital Lcd WatchCasio G-shock Gw9400-1 Rangeman Military Black Triple Sensor Atomic WatchCasio G Shock Multifunction Digital Watch (g-2910) 20bar WrCasio G-shock Frogman Dw-9900 1b Black Titanium Men's Digital Wrist WatchCasio Prg-300-1a2er Mens Pro-trek Black Resin Strap Watch Rrp £220Watch Casio G‑shock Wave Ceptor Gw‑5000hr‑1jfCasio G-shock Limited Edition Blue Turquoise Metallic Watch Dw6900cb-2 RareLot Of 32 Wrist Watches Elgin Casio Citizen Hand Wind & Quartz For Parts/repairCasio Prw-2500t-7 Pro Trek, Altimeter, Barometer, Compass, Men's Watch - BrokenCasio G-shock G-shock Men's Watch Aw-591-2aer2xdigital Casio G-shock Dw6900nb-1 Dw6900 MbLadies Casio Club G Shock Digital Watch 10bar WrCasio Pag-240t-7cr Pathfinder Triple Sensor Multi-function Titanium Men's WatchCasio Men's Pag240t-7cr Pathfinder Triple-sensor Stainless Steel Titanium WatchUsed Casio Edifice Ef-539d-1avef Mens Divers Chronograph Chrome/blackMens Casio Pathfinder Paw 1100 Triple Sensor Compass Barometer Altimeter Look!Casio G-shock Premium Mt-g Alarm Chronograph Radio Controlled Mtg-1500b-1 A1jfWhite Casio G-shock Mens World Time Tide G-rescue Resin G-7900a-7er WatchCasio Men's Efr519-7av "edifice" Active Line Stainless Steel And Resin WatchCasio G-shock Dw6900-1vct Men's Black Resin Sport Quartz Watch With WarrantyCasio G-shock Digital Dial Green Resin Strap Mens Watch Gw9400-3crCasio G7900a-7er G-shock Watch Boxed Good ConditionCasio Men's Gd350-1c G-shock Digital Vibration Shock Resistant Resin WatchCasio G-shock Gw-m5610-1er Tough Solar Radio Controlled Watch.Casio G-shock Gw9400-1 Rangeman Military Black Triple Sensor Atomic Watch Casio Dw-8300 G-shock Vintage Very Rare Casio G-shock Men's Digital Watch - Auto Illuminator & Resin Strap (g7710-1er)Watch Casio Vintage Rare Vdb-1000 Module 658 Touch Screen (1991) Last PieceRare Vintage Casio Remote Controller Cmd-40 Calculator Watch Module 1174Defective Casio G-shock Magnetic Resistant Gray Digital-analog Watch Ga100lg-8aRare Vintage Casio G-shock Dw-6600 Retro Military Diver Digital Watch UhrMen's Casio Vintage Dw-210 Module 548 Japan Wrist Watch Casio Mens G-shock Premium Radio Controlled Solar Powered Watch Rrp £300Casio G-shock Gw-m5610-1er Tough Solar Radio Controlled Watch.Vintage Casio 1984 Tracking Finger Calculator (320) At-550g Never Worn Used!!Casio Men's G-shock Watch, Black Gd-100-1aerCasio Men's G-shock Gw-7900b.Casio G-shock Mens Black Combi Resin Strap Watch G-100-1bvmur G100-1bv G-100-1** Defective **casio G-shock Black Analog Digital Military Sports Watch Ga110-1bMens Casio Watch G Shock Gd-100 Chunky World Time ServicedVintage Genuine Casio Amw-320cCasio Oceanus Manta Ocw-s2050 Wrist Watch For Men