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You are here: Home / Movements / ESA 9164

ESA 9164

Last Update: July 5, 2020

Brand:ESA, ETA
Family:
ESA Mosaba
Height:5.50 mm
Jewels:12
Reserve: hours
Frequency:300 Hz
Winding:Battery
Diameter:29.00 mm (13 ligne)
  Complications:Date, Day, Hacking Seconds, Quick Date Correction, Quick Day Correction
Hands:Central Hour Hand, Central Minute Hand, Central Seconds Hand, Date Window at 3:00, Day Window at 3:00
Distinguishing Technical Characteristics
Battery at 3:00
Tuning Fork
Tuning Fork at 10:30
Production: 1972 – 1976
1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s 2020s

Cal. 9164 is a tuning fork movement with day and date produced by Ebauches SA under license from Bulova. Based on the Bulova Accutron design and designed by Accutron designer Max Hetzel, Cal. 9164 was one of the ESA “Mosaba” family of movements and was included in the “Swissonic” line of electronic movements in the early 1970s.

Introduced in 1972, Cal. 9164 is closely related to the no-date Cal. 9160, released in 1968 but rarely seen, and date-only Cal. 9162, released in 1969. It was widely used by other Swiss companies and carried many brand names and calibre numbers:

  • Baume & Mercier “Tronosonic” Cal. 19164
  • Certina “Certronic” Cal. 29-152
  • Eterna “Eterna Sonic” Cal. 1551
  • IWC Cal. 160
  • Longines “Ultronic” Cal. 633.2
  • Omega “Speedsonic” Cal. 1260
  • Titus Tuning Fork
  • Tissot “Tissonic” Cal. 2020
  • Zenith Movado Cal. 50.5
Images are taken from official publications and are used here for commentary and educational purposes. Copyright is held by the original owner as noted.

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