![Timex 21 Jewels Calendar Watch, Waterproof 6537 7570a [1970]](https://www.vintagetimexwatches.com/wp-content/uploads/2026/02/6537-7570a-21jewels-gold-sweep-head-nos.jpg)
Brand: Timex
Model: Timex 21 Jewels Calendar
Type: Mens watch
Reference: 6537
Caliber: M75 movement, manual wind, center seconds, date
Year: 1970 (A meaning late production)
Dial Code: 6537 7570A
Dial: Champagne, black printed crosshair, 21 Jewels, Water Resistant
This model is NOS (new old stock) and is complete. The outer packaging states Timex watches are fair traded at the preticketed price in fair trade states. 65372 – Timex 21 Calendar Water Resistant chrome plated – Luminous dial, sweep – metal band. $19.95
![Timex 21 Jewels Calendar Watch, Waterproof 6537 7570a [1970]](https://i0.wp.com/www.vintagetimexwatches.com/wp-content/uploads/2026/02/6537-7570a-21jewels-gold-sweep-box3-.jpg?ssl=1)
![Timex 21 Jewels Calendar Watch, Waterproof 6537 7570a [1970]](https://i0.wp.com/www.vintagetimexwatches.com/wp-content/uploads/2026/02/6537-7570a-21jewels-gold-sweep-box.jpg?ssl=1)
![Timex 21 Jewels Calendar Watch, Waterproof 6537 7570a [1970]](https://i0.wp.com/www.vintagetimexwatches.com/wp-content/uploads/2026/02/6537-7570a-21jewels-gold-sweep-box2-scaled.jpg?ssl=1)
![Timex 21 Jewels Calendar Watch, Waterproof 6537 7570a [1970]](https://i0.wp.com/www.vintagetimexwatches.com/wp-content/uploads/2026/02/6537-7570a-21jewels-gold-sweep-papers-scaled.jpg?ssl=1)
![Timex 21 Jewels Calendar Watch, Waterproof 6537 7570a [1970]](https://i0.wp.com/www.vintagetimexwatches.com/wp-content/uploads/2026/02/6537-7570a-21jewels-gold-sweep-instructions-scaled.jpg?ssl=1)
