【Also selling on Mercari Shops - Get a 20% discount coupon by following the shop. #nekoneko → Filter → Seller → Shop (Mercari Shops) to go to Nekoneko-do's Mercari shop】 Also selling vintage and antique watches. → #nekoneko ※ Please be sure to read the profile. ● Product Name: CASIO BP-100 Quartz, Made in Japan Unused, stored item, genuine rubber belt ● Case width: approx. 40mm Lug width: approx. 18mm (Please allow for some margin of error) ● This is a "BP-100" digital watch with a blood pressure monitor made by CASIO. It is a very innovative model that appeared around 1987-1988 as the world's first "digital watch with blood pressure measurement function." It is also the prototype for successor models such as "BPM-100" and "BP-120." It was a groundbreaking "wearable health device" at the time, capable of displaying blood pressure and pulse records on the LCD screen. With its large case and unique design, it is now popular as a retro gadget and a collector's item. It is one of CASIO's early masterpieces in its challenge to "healthcare wearables." Known as the "world's first wearable blood pressure monitor," it can be said to be a pioneer of the health monitoring functions of modern smartwatches (such as Apple Watch and Fitbit). The selling price at the time was around 30,000 yen, and it was also a hot topic technically. Unused stored items are quite rare even among enthusiasts, so I think it is very rare. ● The exterior is in very good condition overall, with no major damage. Please check the photos. ● I have checked the operation upon listing, and the time is displayed correctly on the LCD. I have not checked the other functions because I do not know how to use them, so I cannot guarantee the operation of the other functions. ● There may be scratches and stains that cannot be fully captured in the photos. Also, the evaluation of the item is my subjective opinion, so there may be individual differences. Please refer to the description and photos and consider. ● Shipping will be done as quickly as possible and with careful packaging. I am selling items I have collected as a hobby for the purpose of ending my activities, decluttering, and disposing of unwanted items. Please feel free to comment if you have any questions.