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 Gshock Wave Ceptor Tough Solar Triple Resist Watch Gw-a1000fc-3aCasio Gshock Worldtime 660f/200m Water Resistant Digi/ Analog Watch Aw-591ms-1aCasio Gshock Worldtime 660f/200m Water Resistant Digi/ Analog Watch Aw-591ms-1aCasio Gshock Worldtime 660f/200m Water Resistant Digi/ Analog Watch Aw591-2aCasio Gshock Worldtime 660f/200m Water Resistant Digi/ Analog Watch Aw591-2aG-shock Black Frogman Dw-8201 Limited Titanium Casio Watch Vg (8250 9900 8200Casio G-shock Dw-5600c Parts Set - Case, Working Screws, Module - Needs AssemblyCasio G Shock Ga-110c Graphite Grey Watch FrogmanCasio G Shock G-7900 Tide Graph Moon Phase G-shock Casio G Shock Gwa1100-1a3 Aviation Watch Atomic Time Solar Gravity Defier Black!Casio G-shock Gwf1000-1jf Frogman Tough Solar Atomic Multiband 6 Digital WatchCasio G-shock Mudman G-9000mx - Blue (used/excellent Condition)Casio G-shock Mudman G9000-1vby Box & Papers NwtG-shock Frogman Dw-9901 Wc-9t Gold Limited Titanium Casio Watch Rare (9900 8201Casio G-shock Gwf1000-1jf Frogman Tough Solar Atomic Multiband 6 Digital WatchCasio G Shock Black Red Ga100 5081 Nice Early Gents Casio G Shock Mudman G 9000mc World Time Chronograph WatchCasio G Shock Mtg 1500b 1a1ef Watch In Mint Used ConditionVery Rare Casio Diver Mqd-3000w WatchCasio G-shock "ga110bc-8a" Men's Sports Watch! Silver.Dw-6900mrc Casio G-shock Mister Cartoon Limited Edition Watch Rare Mr.Authentic Casio G-shock Analog/digital Xl Watch Ga200sh-2aCasio G-shock Ga-110eh-8aer X Eric Haze 30th AnniversaryCasio Amw330d-1av Stainless Steel Black Dial Chronograph Sport Men's WatchVintage Casio/japan 187 Ae-90w. Digi/ana. Dual T./alarm/timer/chr. V.v.rare*Casio G-shock Mudman G-9000 - Military Green (used/excellent Condition)Casio Ae-210 Twin Graph Vintage Digital Retro Robot Lcd WatchCasio G-shock "ga200bw-1a" Men's Sports Watch! Black.Vintage Casio Dba-80 Phone Dialer 1987Casio G-shock G-lide Tide Graph Men's Watch Glx-150 Glx150b-6 Msrp $140Casio G-shock Gw9400-3 Rangeman Military Green Triple Sensor Atomic WatchG-shock Dw-8400 Z-1t Men In Black Mudman Casio Watch Vg Super Rare (frogman Casio Prw 2500r 1 Pro Trek Watch Compass Altimeter Barometer Tide Moon Solar Casio G Shock Gw-3500b-1acr Wrist Watch, Solar, Atomic, Analog Digital. NwtCasio Men's Gw530a-1v G-shock Atomic Tough Solar Watch L-6Casio G-shock Frogman Gw-204 I.c.e.r.c Limited Vintage Near Excellent FrogCasio G-shock G7900-1 Tide Digital Men's WatchCasio Men's Gwm500a-1 G-shock Solar Atomic Digital Sports Watch L-6Casio G-shock Mens Tough Solar Navy Resin Military World Time Watch Gr8900nv-2Casio G-shock Ga100-1a4 5081 Shock Resistant Black Watch UsedCasio Special Edition G-shock Dw-56rtb-3dr Timer 11 Watch Green Casio G-shock Mudman Dw-8400 Real Black Limited Edition Vintage Near MintCasio G-shock Mudman Gw-9000a (used/excellent Condition)Casio G-shock Mudman G-9000mx - Black/orange (used/excellent Condition)Casio Ga110gw-7a Wrist Watch For Men G-shock Model No. 5146Casio Sgw500h-2b Mens Twin Sensor 100m Digital Sports Watch Compass ThermometerCasio G Shock Resist G 100 1bv Analog Digital Watch Alarm Illuminator G-shock Skyforce Mudman Dw 6500 8400 Gw-002j Lot 3 Casio Watch Rare Casio G-shock G6900kg-3 Box Men's Vintage Led/lcd Watch Lot,casio Alarm Chrono,coca Cola Magnum Phasar 2000Casio Mrw200h-1bv Mens 100m Black Diver Classic Sports Watch Resin Black SportLadies Casio Baby-g Watch Bg-1302-2erCasio G-shock Gw-4000-1ajf Gw40001ajf Solar Power Black Dial Atomic Alarm WatchCasio Mens Twin Sensor Barometer Sports Watch Sgw-400h-1bverCasio Mens G-shock G7700-1 200 Metre Trainer Watch L-6Casio G Shock Rangeman Black Watch Gw9400-1Casio Men's Pag240-1cr "pathfinder" Triple Sensor Multi-function Sport Watch L-6Casio G-shock "ga110-1b" Tough Body Men's Sport Watch! Black.Casio Edifice Ef527d-1a Mens Black Dial 100m Stainless Steel Chronograph WatchCasio G Shock Dw 9052 1b Digital Watch Resist Illuminator Stopwatch Alarm Timer