8 1/4 x 12”’ | Hand Wind | Swiss Lever | Small Seconds |

Remarks:

• First form movement designed by Junghans
• Unusual design: indirect small seconds with friction spring (most small seconds are directly driven)
• 1962 Junghans renamed its movements, J was replaced by 6, so the J86 became the 686, or more specifically the 686.70

• Listing ID: 20390
• Manufacturer / Brand: Junghans
• Caliber: J89
• Size in French Lignes: 8 1/4 x 12'''
• Size range mm largest diameter: 22 - 31 mm
• Shape: Form
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: Small seconds
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Jewels: 15
• Setting Lever Screw/Pin Position: Left
• Balance Position: Left (240 - 360°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Monometallic screw balance
• Power Reserve: Approx. 50 hours
• Production Period: 1937 - 1939
• Country: Germany
• Identification: Movement marked with Junghans logo (J in a star) and 86, some movements with 8.6. Listed in the Flume K1 catalog in the part from 1947.
• Contributor ©: Uhrforum.de member buchenhain
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-78#post-10849497