16 1/2”’ | Hand Wind | Swiss Lever | Small Seconds | Date |

Remarks:

• This movement is available with bevelled or non-bevelled plate and bridges
• Movement family:
  • Unitas 6497: 18,000 bph, Lépine (open face) movement, pallet fork cock
  • Unitas 6498: 18,000 bph, Savonnette (hunter) movement, pallet fork cock
  • Unitas 6503: 18,000 bph, Lépine (open face) movement, pallet fork cock, date
  • ETA / Unitas 6497-1: 18,000 bph, Lépine (open face) movement, pallet fork bridge
  • ETA / Unitas 6498-1: 18,000 bph, Savonnette (hunter) movement, pallet fork bridge
  • ETA / Unitas 6497-2: 21,600 bph, Lépine (open face) movement, pallet fork bridge
  • ETA / Unitas 6498-2: 21,600 bph, Savonnette (hunter) movement, pallet fork bridge

• Listing ID: 19964
• Manufacturer / Brand: Unitas
• Caliber: 6503
• Size in French Lignes: 16 1/2'''
• Size range mm largest diameter: 31 - 40 mm
• Shape: Round
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: Small seconds
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: Date
• Jewels: 17
• Setting Lever Screw/Pin Position: Left
• Balance Position: Right (0 - 120°)
• Shock Protection: Incabloc and others
• Beats per hour: 18,000
• Balance Type: Nickel
• Power Reserve: Approx. 50 hours
• Production Period: Unknown
• Country: Switzerland
• Identification: Movement marked with Unitas logo and 6503 under the balance wheel. Original datasheet from 1976 available. Listed in the Flume K3 catalog from 1972.
• Contributor ©: Anonymous