Ronda 4135

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8 3/4”’ | Hand Wind | Swiss Lever | Sweeping Seconds | Date |

Remarks:

  • The movement belongs to a family of movements 413x, 423x, 433x, 443x
    413x: 8 3/4”’
    423x: 10 1/2”’
    433x: 11 1/2”’
    443x: 12”’
    x = 1: Hand winding, two hands
    x = 3: Hand winding, three hands with sweeping seconds
    x = 5: Hand winding, three hands with sweeping seconds, date
    x = 7: Hand winding, three hands with sweeping seconds, date, day
    x = 8: Automatic, three hands with sweeping seconds, date
    x = 9: Automatic, three hands with sweeping seconds, date, day
    Not all combinations were available.
  • Interesting variant for semi-quick adjustment of the date: When the time is set backwards, the date is advanced by one day every 30 minutes

 

  • Listing ID: 5141
  • Manufacturer / Brand: Ronda
  • Caliber: 4135
  • Size: 8 3/4''', height 4.25 mm
  • Shape: Round
  • Winding: Manual (Crown)
  • Hand Setting: Crown
  • Seconds Hand: Sweeping seconds (central seconds)
  • Escapement: Lever (Swiss, English, Glashütte)
  • Date & Day: Date
  • Jewels: 17
  • Setting Lever Screw/Pin Position: Left
  • Balance Position: Left (240 - 360°)
  • Shock Protection: KIF Protechoc
  • Beats per hour: 21,600
  • Balance Type: Nickel
  • Power Reserve: Unknown
  • Production Period: Approx. late 1970s to early 1980s
  • Identification: Movement marking and original documents from Ronda.
  • External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/#post-1117098
  • Country: Switzerland
  • Contributor ©: Uhrforum.de member Badener (Andreas Kelz)

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