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

Remarks:

• Automatic: hand winding possible
• Date with quick setting on middle crown position
• Day without quick setting
• Crown and winding stem in one piece, winding stem with pinion for setting the hands (see extra picture)
• Probably a renamed Orient 16720 or similar (the 16720 only has a date, no day!)
• Movement family:
  • Hamazawa 5020A = Hand winding, sweeping seconds
  • Hamazawa 5022A = Hand winding, sweeping seconds, date
  • Hamazawa 5023A = Hand winding, sweeping seconds, date, day
  • Hamazawa 5025A = Automatic, sweeping seconds, date
  • Hamazawa 5026A = Automatic, sweeping seconds, date, day

• Listing ID: 4810
• Manufacturer / Brand: Hamazawa
• Caliber: 5026A
• Size: 11 1/2'''
• Shape: Round
• Winding: Automatic
• Hand Setting: Crown
• Seconds Hand: Sweeping seconds (central seconds)
• Escapement: Lever (Swiss, English, Glashütte)
• Date & Day: Date & Day
• Jewels: 17
• Setting Lever Screw/Pin Position: Right
• Balance Position: Right (0 - 120°)
• Shock Protection: Seiko Diashock
• Beats per hour: 21,600
• Balance Type: Unknown
• Power Reserve: Unknown
• Production Period: Unknown, probably around 1975
• Identification: Rotor markes with Hamazawa 5026A
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-5#post-1581985
• Country: Japan
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)