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Zenith Caliber 135-O Description
The Zenith Caliber 135-O is a mechanical watch movement produced by the renowned Swiss watch manufacturer, Zenith. The “Caliber 135” series of movements was introduced in the mid-1940s and gained popularity for its accuracy and reliability.
The Zenith Caliber 135-O is a hand-wound movement, meaning that it requires manual winding for operation. It has a power reserve of approximately 42 hours, allowing the watch to run for almost two days before needing to be wound again.
This movement features a small seconds sub-dial, which is a separate dial that indicates the seconds. This sub-dial is often positioned at either the 6 o’clock or 9 o’clock position on the watch dial, adding a stylish visual element to the overall design.
The Caliber 135-O is equipped with 18 jewels, which helps reduce friction and improve the longevity of the movement. It also operates at a frequency of 18,000 vibrations per hour (vph), which is relatively slower compared to modern high-beat movements. However, this lower frequency gives the movement a unique and smooth sweeping motion of the seconds hand.
Zenith has a rich history of producing exceptional timepieces, and the Caliber 135-O embodies the brand’s commitment to precision and craftsmanship. It is often found in vintage Zenith watches and is highly valued by collectors and enthusiasts.
Overall, the Zenith Caliber 135-O is a classic and reliable mechanical movement that offers accuracy, durability, and a touch of vintage charm to any timepiece it is featured in.