10 1/2”’ | Hand Wind | Swiss Lever | Small Seconds | Date |

Remarks:

• The Ultra 606 is an Ultra 602 with an additional date
• Unusual: three bearing surfaces protruding beyond the edge of the movement on the dial side (as on the 602)
• Date numerals 1 – 31 alternate between black and red
• Very simple date setting:
  A finger on the hour wheel picks up a star-shaped date changing wheel every twelve hours. This has alternating short and long teeth. The finger advances both versions of the teeth, but only the long teeth advance the date disk every 24 hours

• Listing ID: 2614
• Manufacturer / Brand: Ultra
• Caliber: 606
• Size in French Lignes: 10 1/2'''
• Size range mm largest diameter: 22 - 31 mm
• Shape: Round
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: Small seconds
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: Date
• Jewels: 15
• Setting Lever Screw/Pin Position: Left
• Balance Position: Bottom (120 - 240°)
• Shock Protection: Incabloc
• Beats per hour: 18,000
• Balance Type: Monometallic screw balance
• Power Reserve: Unknown
• Production Period: Unknown
• Country: France
• Identification: Marked with ULTRA under the balance. Dial marked ULTRA 606 calendrier. The dials of Ultra watches are very often marked with the caliber number (41, 602, 904,...). Not listed in any movement finder that I know of.
• 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-35#post-4309979
• External Link 2: https://watch-movements.eu/blog/en/2018/07/01/ultra-watches-and-movements-from-france/