18 1/2”’ | Hand Wind | Swiss Lever | Stopwatch |

Remarks:

• Stopwatch with column wheel, 60 s (1/5 s steps), 30 min counter
• Stopwatch mechanism on dial side
• Optionally available with 30 s (1/10 s steps), 15 min instead of 60 s, 30 min
• Movement family:
  • J29: 3 jewels, no shock protection
  • J29 new: 4/7 jewels, simplified operating lever spring and hammer spring, no shock protection
  • J29a (629.70): 4 jewels, several details modified, available with and without shock protection
  • J29b (‘Caliber Löbner’): 7 jewels
  • J29c: 7 jewels
  • J29/I,  J29/1 (628.71): 4, 7 jewels, shock protection
  • J29/II (628.72): 7 jewels, split second, shock protection
  • J29a/II: 4 jewels, split second, shock protection
• 1962 Junghans renamed its movements, J was replaced by 6, so the J29 became the 629

• Listing ID: 17688
• Manufacturer / Brand: Junghans
• Caliber: J29a / 629.70
• Size in French Lignes: 18 1/2'''
• 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: 4
• Balance Position: Bottom (120 - 240°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Nickel
• Power Reserve: Approx. 15 hours
• Production Period: 1930 - 1950
• Country: Germany
• Identification: Movement marked with J 29a.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)
• External Link 2: https://dirkfassbender.de/j29.html