Which timekeeping technology revolutionized wristwatches in the 1930s?

The timekeeping technology that revolutionized wristwatches in the 1930s is mechanical movements. During this period, the transition from pocket watches to wristwatches became increasingly popular, and the development of reliable mechanical movements played a significant role in this transition.

Mechanical movements, particularly those that were compact and efficient, allowed wristwatches to become more accurate and easier to manufacture, contributing to their widespread adoption. This was a time when advancements in watchmaking techniques, such as the use of smaller components and improved mainspring designs, enhanced the reliability and functionality of wristwatches. While quartz technology emerged later in the 20th century and indeed transformed the watch industry in terms of accuracy and cost, it was the innovations in mechanical movements in the 1930s that laid the groundwork for the modern wristwatch.

The introduction of more sophisticated watch designs and the incorporation of these mechanical movements during that era were critical in changing how people perceived and wore timepieces. Therefore, the focus on mechanical movements is key to understanding this pivotal moment in horological history.