18 1/2”’ | Hand Wind | Swiss Lever | Small Seconds | Alarm |

Remarks:

• Rocking bar winding
• Click on the dial side
• Time setting with crown and pusher at 1H
• One single mainspring for movement and alarm
• Maximum alarm duration approx. 15 s
• A specific stop work device limits the amount of mainspring tension used by the alarm, preventing the movement to stop
• Alarm time setting with pusher at 11: each push increments the alarm hand by 12 minutes. Not completely pressing the button allows for smaller increments
• Alarm loudness can be adjusted with a screw at 5:30H under the bezel
• Lever on the back to enable/disable alarm function
• The J10 replaced the J5 in 1910,  the J36 replaced the J10 in 1923

• Listing ID: 11532
• Manufacturer / Brand: Junghans
• Caliber: J10
• Size in French Lignes: 18 1/2'''
• Size range mm largest diameter: > 40 mm
• Shape: Round
• Winding: Manual (Crown)
• Hands Setting: Crown with pin/pusher
• Seconds Hand: Small seconds
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Other Functions: Alarm
• Jewels: 7, 11, 15
• Setting Lever Screw/Pin Position: None (Negative Winding)
• Balance Position: Right (0 - 120°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Monometallic screw balance
• Power Reserve: 54 (with alarm) / 66 hours
• Production Period: 1911 - 1921
• Identification: Listed in the Flume K1 catalog in the part from 1947, and in Junghans catalogs from 1915 and 1931.
• Country: Germany
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)