Junghans 684 / 684.10 / J84

56 views

11 1/4”’ | Hand Wind | Swiss Lever | Direct Sweeping Seconds |

Remarks:

Swan-neck regulator
KIF Duofix setting for escape wheel
1962 Junghans renamed its movements, J was replaced by 6, so the J84 became the 684
Movement family:
- J84, J84/1: screw balance, Trilastic mounting:
  - 684.80 = J84: special mainspring
  - 684.80 = J84/1: standard mainspring
- J84/S: ring balance, Trilastic mounting:
  - 684.70: base movement
  - 684.72: higher motion works for raised hands
  - 684.73: date
- J84/S3: ring balance, Meister (master movement, gold-plated), swan-neck regulator, mounting rim or Trilastic mounting:
  - 684.71: base movement
  - 684.76: higher motion works for raised hands
  - 684.77: date
- J84/S10: ring balance, KIF Duofix setting for escape wheel, mounting rim:
  - 684.00: base movement
  - 684.01: higher motion works for raised hands
  - 684.02: date
  - 684.74: date, difference to 684.02 unknown
- J84/S10: ring balance, Meister (master movement, gold-plated), swan-neck regulator, KIF Duofix setting for escape wheel, mounting rim:
  - 684.10: base movement
  - 684.11: raised hands
  - 684.12: date
  - 684.75: date, difference to 684.12 unknown

Listing ID: 8714
Manufacturer / Brand: Junghans
Caliber: 684 / 684.10 / J84
Size in French Lignes: 11 1/4'''
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: 17
Setting Lever Screw/Pin Position: Left
Balance Position: Bottom (120 - 240°)
Shock Protection: Junghans II
Beats per hour: 18,000
Balance Type: Glucydur
Power Reserve: Approx. 44 hours
Production Period: 1955 - 1967 (different variants of J84, 684)
Country: Germany
Identification: Wheel train bridge marked with JUNGHANS 684. Listed in the Flume K1 catalog in the part from 1957.