10 1/2”’ | Hand Wind | Swiss Lever | Direct Sweeping Seconds

• Listing ID: 11339
• Manufacturer / Brand: Seiko / Seikosha
• Caliber: Super
• Size in French Lignes: 10 1/2''', height 5.0 mm
• Size range mm largest diameter: 22 - 31 mm
• Shape: Round
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: Sweeping seconds (central seconds)
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Jewels: 10
• Setting Lever Screw/Pin Position: Right
• Balance Position: Bottom (120 - 240°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Monometallic screw balance
• Power Reserve: Unknown
• Production Period: 1950+
• Identification: See https://www.beyondthedial.com/post/seiko-history-daini-suwa-fact-and-fiction/
• External Link 2: https://www.beyondthedial.com/post/seiko-history-daini-suwa-fact-and-fiction/
• Country: Japan
• Contributor ©: Uhrforum.de member buchenhain