22”’ | Hand Wind | Swiss Lever | Stopwatch with Split Second (Rattrapante) |

Remarks:

• Stopwatch:
  • Central stop seconds
  • Decentralized 15 min counter at 12 h
  • Split seconds hand (rattrapante)
  • Right button: start/stop seconds hand
  • Left button: start/stop split-seconds hand
  • Crown: zero setting by pressing
• Movement family:
  • 890A: 18,000 bph -> 1/5 s, max. 30 min, split second (rattrapante)
  • 890B: 36,000 bph -> 1/10 s, max. 15 min, split second (rattrapante)
  • 890C: 360,000 bph -> 1/100 s, max. 10 min, no split second (rattrapante)
• No picture of dial side available

• Listing ID: 12060
• Manufacturer / Brand: Seiko
• Caliber: 890B
• Size in French Lignes: 22''', height 10.7 mm
• Size range mm largest diameter: > 40 mm
• Shape: Round
• Winding: Manual (Crown)
• Seconds Hand: Sweeping seconds (central seconds)
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Other Functions: Stopwatch
• Jewels: 15
• Balance Position: Bottom (120 - 240°)
• Shock Protection: Seiko Diashock
• Beats per hour: 36,000
• Balance Type: Monometallic screw balance
• Power Reserve: Unknown
• Production Period: 1963 - 1977
• Country: Japan
• Identification: Movement marked with SEIKOSHA and 890B.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)
• External Link 2: https://www.plus9time.com/blog/2019/7/8/89st-series-luxury-stopwatches