From calculators to smartwatch: Casio's featured-filled, ruggedized trip through time

The road to Casio's first smartwatch offering -- see "Casio announces rugged Smart Outdoor Watch Android Wear device" -- was paved by more than four decades of firsts in the wristwatch industry. It all started in 1974 when Casio first made the move from electronic calculators to clocks...

Following up its success in the electronic calculator market, Casio introduced its first timepiece -- the Casiotron.

Casio's first shock resistant watch bucked the industry trend of thinner and lighter timepieces, and went on to become the company's signature watch.

Casio's Databank Telememo 10 (CD-40) could save and recall 10 groups of 16 letters or numerals.

Only 3.9 millimeters thick and weighing 12 grams, Casio's PELA FS-10 featured a watch and plastic wristband molded into a single piece.

The BM-100WJ was Casio's first digital watch to include weather prediction sensors. An internal barometer sensor measured the air pressure every three hours. Air pressure data could also be used to tell the wearer his or her approximate altitude or underwater depth.

Casio's BP-100 model sported a blood pressure gauge.

Casio's Twincept combined digital and analog displays on a wristwatch that displayed text data on glass.

Casio's Satellite Navi was billed as the world's first GPS watch.

Casio called its model WMP-1V the world's first wristwatch with an MP3 Player.

Casio promoted the WQV-1 Wrist Camera as the world's first wristwatch digital camera.

The 1000 Series "Manta" model in Casio's elite Oceanus line features an analog watchface, five-motor drive, multi-band technology and sapphire glass crystal.