Casio developed a heart rate monitor watch more than 25 years before Apple's first ECG featured Smart Watch - Anviya
Rachael42.eth on Twitter: "And her sister watch! The Casio 100 that measures your blood pressure. Got that too! #PriorArtFile #GearNerd https://t.co/jQIGuPLwUR" / Twitter
Vintage Casio Bp-120 Blood Pressure Monitor Men's Rare Digital Wrist Watch Japan