12”’ | Automatic | Swiss Lever | Sweeping Seconds | Date |

Remarks:

• Automatic with bidirectional winding, manual winding possible
• Sweeping seconds with hacking
• Date with quick setting
• 24 h indicator at 10:30H
• The NH37A is equivalent to the Seiko 4R37A
• Lifting angle 53°
• Automatic winding by Seiko Magic Lever
• Rotor with ball bearings
• Various plastic parts for the date mechanism
• Extra plastic dial holder
• Part of a movement family:
  • NH35: Date
  • NH36: Date, day
  • NH37: Date, 24 h indicator
  • NH38: no date, no day, no 24 h indicator
  • NH39: 24 h indicator

• Listing ID: 2904
• Manufacturer / Brand: SII / Seiko
• Caliber: SII NH37A / Seiko 4R37A
• Size in French Lignes: 12''', Height 5.32 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: 24
• Setting Lever Screw/Pin Position: Left
• Balance Position: Bottom (120 - 240°)
• Shock Protection: Seiko Diashock (not the classic "flower shape"!)
• Beats per hour: 21,600
• Balance Type: Glucydur
• Power Reserve: Approx. 40 hours
• Production Period: From 2011
• Identification: Original data sheet available. Movement labeled NH37A
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-31#post-4052610
• Country: Japan
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)