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

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: 10551
• Manufacturer / Brand: Unitas
• Caliber: 6498
• 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...: None
• Jewels: 17
• Setting Lever Screw/Pin Position: Right
• Balance Position: Bottom (120 - 240°)
• Shock Protection: Incabloc and others or none
• Beats per hour: 18,000
• Balance Type: Nickel
• Power Reserve: Approx. 50 hours
• Production Period: Unknown. The predecessor model, the Unitas 498, is already listed in the 1950 Ebauches SA catalog. The 6498 was presumably only available starting around the mid-1960s.
• Country: Switzerland
• Identification: Movement marked with Unitas logo and 6498 under the balance wheel. Original datasheet from 1976 available. Listed in the Engelkemper catalog from 1969.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-78#post-10765504