Cal. 16x was a series of popular watch movements produced by Enicar Watch Company at the end of the 1960s. Note that these movements were initially names Cal. 116x but were quickly renamed with the shorter numeral.
Although this movement was developed after most other industry players had automatic winding mechanisms, the design shows some tentativeness from Enicar. The winding rotor is mounted using ball bearings but is also mounted to a threaded pin at the center of the winding bridge. The winding gear train is connected to a conventional ratchet wheel and click, which overhangs the balance. The manual winding works is also unusual, and seemingly adapted from a hand winding movement rather than designed for an automatic. It features a long click spring and a “dent” to keep the wheels in place.
The Enicar Cal. 165 was later adopted by Chronoswiss and used as the basis for their Cal. C122 regulator. Note that Chronoswiss replaced the automatic winding works with an entirely new and simplified design but retained the curious hand-winding works with its distinctive “dent” in the bridge.
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