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

Remarks:

• Movement family:
  • AS 5100: 21.600 bph, hand winding
  • AS 5101: 21.600 bph, hand winding, date
  • AS 5102: 21.600 bph, automatic
  • AS 5103: 21.600 bph, automatic, date
  • AS 5104: 21.600 bph, hand winding, date, day
  • AS 5106: 21.600 bph, automatic, date, day
  • AS 5150: 28.800 bph, hand winding
  • AS 5151: 28.800 bph, hand winding, date
  • AS 5152: 28.800 bph, automatic
  • AS 5153: 28.800 bph, automatic, date
  • AS 5154: 28.800 bph, hand winding, date, day
  • AS 5156: 28.800 bph, automatic, date, day

• Listing ID: 21366
• Manufacturer / Brand: AS / Zenith
• Caliber: AS 5100 = Zenith 21.0
• Size in French Lignes: 8 3/4'''
• Size range mm largest diameter: 0 - 22 mm
• Shape: Round
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: Sweeping seconds (central seconds)
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Jewels: 17
• Setting Lever Screw/Pin Position: Right
• Balance Position: Right (0 - 120°)
• Shock Protection: Incabloc
• Beats per hour: 21,600
• Balance Type: Nickel
• Power Reserve: Approx. 50 hours
• Production Period: 1972+
• Country: Switzerland
• Identification: Movement marked with ZENITH 21.0. Original data sheet for AS 500x from 1976 available.
• Contributor ©: Anonymous