11 1/2”’ | Automatic | Swiss Lever | Direct Sweeping Seconds | Date |

Remarks:

• Automatic with bidirectional winding, manual winding possible
• Direct sweeping seconds with hacking
• Date with quick setting
• Lifting angle 51°
• Regulation
  • 12 s/d ±12 s/d in positions CH, 6H
  • Max. Rate deviation all positions 30 s/d
  • Isochronism over 24 h ±20 s/d

• Listing ID: 2957
• Manufacturer / Brand: Ronda
• Caliber: R150
• Size in French Lignes: 11 1/2''' (26.00 mm), Height 4.40 mm
• Size range mm largest diameter: 22 - 31 mm
• Shape: Round
• Winding: Automatic
• Hands Setting: Crown
• Seconds Hand: Sweeping seconds (central seconds)
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: Date
• Jewels: 25
• Setting Lever Screw/Pin Position: Left
• Balance Position: Right (0 - 120°)
• Shock Protection: Incabloc
• Beats per hour: 28,800
• Balance Type: Glucydur
• Power Reserve: 40 hours
• Production Period: Presented at Baselworld 2016, but first movements not delivered until Q3 or Q4 2017
• Identification: Marked with RONDA R150 next to the balance wheel.
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-31#post-4024446
• External Link 2: https://watch-movements.eu/blog/en/2018/04/15/the-ronda-r150-under-the-loupe/
• Country: Switzerland
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)