Casio JP-100W "Pulse Check" watch Japan 1987

Great condition

new battery and fully serviced

Sensor works perfect 

New Genuine Casio strap fitted 

The Casio JP-100W (released in 1987) is a highly collectible vintage digital sports watch famously known as the "Pulse Check".

It holds historical significance as Casio's very first wristwatch featured with a built-in optical pulse sensor, operating as an early predecessor to modern fitness smartwatches

• Module: Powered by the Casio Module 509.
• Battery Type: Uses a CR1616 lithium coin cell battery.
• Materials: Built with a black rectangular resin case, flat acrylic glass crystal, and a 18 mm lug width resin strap.
• Water Resistance: Rated for 50 metres (5 BAR).
• Aesthetics: Characterised by a distinctive front-facing fingertip sensor pad, a mini multi-segment graphic display, and pop-colour options (most notably the rare bright yellow or blue "PULSE" button versions). 

• Fingertip Pulse Check: Measures heart rate when the user places a finger firmly over the built-in sensor panel.
• Jogger Pacer (Jog Mode): Features an adjustable audible tempo trainer (5 to 240 steps per minute) to help runners maintain consistency. It provides automated post-run reminders to check heart rates.
• Advanced Memory: Track up to 9 distinct split times within the standard 1/100-second chronograph system.
• Standard Timekeeping: Includes 3 independent daily/weekly alarms, an hourly chime, and a 20-hour countdown timer.