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 Men's G-shock Premium Sky Cockpit Compass Watch Ga-1000fc-1aer Rrp £300Casio Edifice Tough Solar Eqw-t620 Mens WatchCasio G-shock Frogman Dw-9901 Wccs Limited Vintage Near Mint Dw-9000 FrogCasio Pro Trek Prw-6100yt-1jf Prw-6100yt-1 Titanium Band Triple Sensor Ver.3All Original Casio Edifice Men's 4 Crowns Chronograph 100m Diver Ss Watch NrCasio Pro Trek Prw-6100fc-1jf Prw-6100fc-1 Triple Sensor Ver.3 Men's WatchCasio Efr-550d-1avuef Mens Edifice Silver Steel Bracelet Watch Rrp £190Casio Analog Chronograph Case Mwc-100 Lovely Gray Metallic With Green With Vgc Casio Sea Pathfinder Spf-70t Pro Trek Solar Triple Sensor Big 52mm Diver DigitalCasio Pro Trek Watch 2271 Prg-40Casio Gw-9110-1er G-shock Gulfman Titanium Tough Solar Wave CeptorCasio Prw2500-1 Mens Pro Trek Tough Solar Power Chronograph WatchCasio Pro Trek Watch 2271 Prg-40Mens Casio Triple Sensor Prg70 Module 2872 WatchCasio Ga-110mb-1aer Mens G-shock Matt Black Resin Strap Watch Rrp £120Casio Ga-100mb-1aer Mens G-shock Matt Black Resin Strap Watch Rrp £110Ultra Rare Casio G-shock Mudman G-9000mc-8 Jam'inGents Casio 593 A159wge Gold Tone Vintage Style Digital Wristwatch - V16 P17Casio Pro Trek Prw-3100fc-1jf Prw-3100fc-1 Triple Sensor Ver.3 Men's WatchCasio Gw-3000m Mens G-shock Orange Multi Function WatchCasio Prw-2500t-7 Pro Trek, Digital, Altimeter, Barometer, Compass, Men's WatchCasio G-shock Dw-5600 Yellow Quartz Men WatchCasio G-shock Gw-3000b Solar Multi Band 6 In Excellent ConditionCasio Men's G-shock Antimagnetic Watch 5146 Ga-110Men's Watch Lot,citizen Elgin Fossil Pulsar Lorus Casio Armitron & MoreCasio Ga-100mb-1aer Mens G-shock Matt Black Resin Strap Watch Rrp £110Casio Gd-120mb-1er Mens G-shock Matt Black Resin Strap Watch Rrp £100Casio Gold Dw-5600 G-shock Shock Resistant Watch Mod. 691 Very Rare 1987 JapanCasio Eqb-510rbm-1aer Mens Edifice Red Bull Racing Ltd Ed Solar Watch Rrp £550*nice* Casio G Shock Rangeman Gw-9400 Solar Powered Military Green Watch! Casio G-shock G-3110Casio 3157 Sgw-100 Gents Digital Watch 5 Alarm World Time Thermometer & CompassCasio Mens G-shock Twin Sensor Neon-illuminator Watch Rrp £260Casio Gba-400-1aer Mens G-shock Black Bluetooth Combi Watch Rrp £180Casio Eqw-a1400db-1aer Mens Edifice Radio Controlled Solar Powered Watch Rp £450Casio Ga-100mb-1aer Mens G-shock Matt Black Resin Strap Watch Rrp £110Casio Dw-5200 Hero G-shock Shock Resistant Watch Mod. 240 Very Rare 1984 JapanRare Casio A201 '48 Hrs ' 'blue Thunder'Casio G Shock Gravity Defy In Orange, Gw-3000m Solar, ExcellentCasio G-shock G-lide X In4mation Watch Glx-6900xa-9 Rasta Excellent Rare LimitedCasio Edifice Chronograph Stainless Steel Japan (4358) Efr-500 Quartz Men WatchCasio Gba-400-1aer Mens G-shock Black Bluetooth Combi Watch Rrp £180Casio Ga-110mb-1aer Mens G-shock Matt Black Resin Strap Watch Rrp £120Mens Casio Sport Paw 1100 Pathfinder Triple Sensor Tough Solar Watch 3043 JapanRare All Original Casio Edifice Men's Chronograph 100m Diver Ss Watch NrCasio Edifice Red Bull Racing Era-200rb Mens WatchCasio G-shock Dw-5600 Gray Limited Vintage Used Bezel CrackedCasio G-shock Gw-m5610-1bjfCasio Ga-100cf-1a9er Mens G-shock Black Chronograph Watch Rrp £110Casio G-shock Analog Digital White Resin Strap 200m World Time Watch Ga100a-7aCasio G Shock G-701d Boxed With Manual And 2 Spare LinksCasio G Shock Wave Ceptor Tough Solar Gw 810d Multi Band 5 World Time Chrono G/cCasio Chronograph Date Stainless Steel Quartz Men Watch ( Amw-330)Casio Eqb-510rbm-1aer Mens Edifice Red Bull Racing Ltd Ed Solar Watch Rrp £550Casio Prg-280-1er Mens Pro Trek Twin Sensor Watch Rrp £200Casio Prg-300-1a2er Mens Pro-trek Black Resin Strap Watch Rrp £220Casio Gr-8900a-7er Mens G-shock World Time White Solar Powered Watch Rrp £120Casio G-shock Glx5600-1 Black Surfing/swimming Wrist Watch 200m/20bar CleanCasio G-shock Mt-g S1000d 1a Tough Solar Multy Band 6 Tough Solar Casio G-shock Frogman Gwf 200m Divers Watch In Box