For sale is a rare 1970s Jaeger-LeCoultre Master-Quartz. As some of you might know, JLC was part of the Centre Electronique Horloger (CEH), a consortium of Swiss watchmakers that helped develop the country’s first quartz movement – the Beta 21. Despite this, JLC turned to Girard Perregaux to equip its Master-Quartz watches. In fact, the first commercially-available quartz watch wasn’t the Beta 21. It was actually the Girard Perregaux series 350, developed in partnership with Motorola. These movements were the first with a frequency of 32,768 kHz, which is still the industry standard today. The Beta 21-based movement beat was several times slower, at 8,192 Hz. In practice, this resulted in higher precision and less power consumption. The watch itself is in excellent condition, with only a few minor scratches. It features a gorgeous blue sunburst dial that can range from a bright lavender color to deep blue, depending on the lightning. It comes with an 18mm Watch Garage leather strap. **Details & More** **Condition:** Very good. The case and crystal have very faint scratches, which I did my best to try and photograph. Please see the pictures for a better description. **Case Size:** 37.6 x 43.6 mm stainless steel case, with a thickness of 13.9 mm and a 19 mm lug width. **Movement:** Girard Perregaux Quartz Ref. 352 with a frequency of 32,768Hz. It has a mechanical quickset feature. **Other Information:** * Includes an 18mm Watch Garage tan leather strap that retails for 80$. **Price:** Asking $1,425 (€1,315). Add 80$ for worldwide shipping via UPS or €35 for GLS shipping in Europe. [Pictures](https://imgur.com/a/XUegK84) [Timestamp](https://imgur.com/a/i8xVpne)