5 3/4 x 8 3/4”’ | Hand Wind | Swiss Lever | No Seconds |

Remarks:

• Movement family:
  • Unitas 520: two small screws for crown wheel
  • Unitas 521: one large screw for crown wheel

• Listing ID: 14485
• Manufacturer / Brand: Unitas
• Caliber: 520
• Size in French Lignes: 5 3/4 x 8 3/4''' (according to manufacturer 5 1/3 x ...)
• Size range mm largest diameter: 0 - 22 mm
• Shape: Form
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: None
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Jewels: 15
• Setting Lever Screw/Pin Position: Right
• Balance Position: Right (0 - 120°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Monometallic screw balance
• Power Reserve: Unknown
• Production Period: Around 1950
• Country: Switzerland
• Identification: Dial side marked with Unitas logo and 520. Listed in the "Official Catalogue of genuine Swiss Watch repair parts" from 1949. Data sheet from 1951 available.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)