10 1/2”’ | Hand Wind | Swiss Lever | Indirect Sweeping Seconds |

Remarks:

• Movement family:
  • IWC 401: 1952 – 1965 (22,800 pieces), height 3.65 mm, screw balance, swan-neck regulator
  • IWC 402: 1965 – 1969 (approx. 19,000 piexes), height 3.15 mm, balance without screws, simple regulator, Girocap combined settings for escape wheel, pallet fork made of gold
  • IWC 403: 1970 – 1974 (25,800 pieces), like 402, but Lubrifix-66 combined settings for escape wheel

• Listing ID: 18702
• Manufacturer / Brand: IWC
• Caliber: 401
• Size in French Lignes: 10'''
• Size range mm largest diameter: 22 - 31 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: Bottom (120 - 240°)
• Holes in setting lever spring or rocking bar: 5
• Shock Protection: Incabloc
• Beats per hour: 19,800
• Balance Type: Monometallic screw balance with Breguet hairspring
• Power Reserve: Approx. 40 hours
• Production Period: 1952 - 1965
• Country: Switzerland
• Identification: Movement marked with IWC and C. 401.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)