![Timex Sportster Womens Dive Watch 21571 10176 [1976]](https://www.vintagetimexwatches.com/wp-content/uploads/2026/04/21571-10176-sportstercalendar-chrome-bluebezel-sweep-head.jpg)
Brand: Timex
Model: Timex Sportster Calendar Watch
Type: Kids/Womens DIve Watch
Reference: 21571
Caliber: M101 Movement, manual wind, center seconds, date
Year: 1976
Dial Code: 21571 10176
Case: Chrome plated
Dial Blue with orange block markers
Bezel: Blue 12 hour GMT bezel
Hands: lumed with orange sweeping seconds
This is a late production model with all catalog references being for the year before with a tachometer bezel.
![Timex Sportster Dive Watch 21570 10175 [1975]](https://i0.wp.com/www.vintagetimexwatches.com/wp-content/uploads/2026/04/21570-10175-sportstercalendar-source-2.jpg?ssl=1)
![Timex Sportster Dive Watch 21570 10175 [1975]](https://i0.wp.com/www.vintagetimexwatches.com/wp-content/uploads/2026/04/21570-10175-sportstercalendar-source-1.jpg?resize=271%2C454&ssl=1)
![Timex Sportster Dive Watch 21570 10175 [1975]](https://i0.wp.com/www.vintagetimexwatches.com/wp-content/uploads/2026/04/21570-10175-sportstercalendar-source.jpg?ssl=1)