Zenith 525.8

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5 1/4 x 8 1/2”’ | Hand Wind | Swiss Lever | No Seconds |

Remarks:

Variants of the movement:
- Zenith 525: 18,000 bph, without shock protection
- Zenith 528.8: 21,600 bph, without shock protection
- Zenith 525.8-6: 21,600 bph, Incabloc shock protection

Listing ID: 2126
Manufacturer / Brand: Zenith
Caliber: 525.8
Size in French Lignes: 5 1/4 x 8 1/2''' (12.5 x 19.2 mm). The movement is more like 5 1/2''', but according to the manufacturer it is 5 1/4'''
Size range mm largest diameter: 0 - 22 mm
Shape: Form
Winding: Manual (Crown)
Hands Setting: Crown
Seconds Hand: None
Escapement: Lever (Swiss, English, Glashütte)
Date, Day, Month...: None
Jewels: 15
Setting Lever Screw/Pin Position: Right
Balance Position: Right (0 - 120°)
Shock Protection: None
Beats per hour: 21,600
Balance Type: Monometallic screw balance
Power Reserve: Unknown
Production Period: 1946 - 1954 (57.000 pieces)
Identification: Marked 525.8 under the balance. Original data sheet available.
External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-42#post-5446433
External Link 2: https://watch-movements.eu/blog/en/2020/10/03/zenith-movements-in-display-watch-cases/
Country: Switzerland