Brand: Casio Model: F-91W Reference: F-91W-1JF Date: 2023 Movement: Quartz Calibre: N/A Jewels: N/A Power Reserve: N/A Case Material: Resin Case Diameter: 35.2mm Case Thickness: 8.5mm Lug to Lug; N/A Lug Width: N/A Crystal: Glass Weight: 21 grams Water Resistance: 30 m Bracelet Material: Plastic, Black Functions: Chronograph, Date, Date, Alarm Original Box & Paper: Yes
The Casio F-91W is a digital watch manufactured by the Japanese electronics company Casio. Introduced in 1989 as a successor of the F-87W, it is popular for its low price and long battery life. As of 2011, the annual production of the watch is 3 million units, which makes it the most-sold watch in the world (apart from Apple).