Junghans J89-2; Junghans 689.70; Bulova 12B

Caliber Junghans J89-2; Junghans 689.70; Bulova 12-B


Junghans J89; Junghans 689.70; Bulova 12-B; Front


Junghans J89; Junghans 689.70; Bulova 12-B; Werk; movement


Junghans J89; Junghans 689.70; Bulova 12-B; Rückseite; Back

  • Type: men´s wristwatch; wrist alarm
  • Manufacturer on dial: Bulova
  • Trademarks/imprint: BULOVA Wrist Alarm / BACK: STAINLESS STEEL BACK; SHOCK PROOF; 20 MIKRON; eight-pointed star with J
  • Number of jewels: 17
  • Escapement: lever escapement
  • Balance staff: screw balance
  • Shock protection: Junghans II
  • Particularity: wrist alarm
  • Beats per hour: 18.000 A/h
  • Dimensions of movement: 12.5'''
  • Time of production: 1951 – 1958; hier späte Version
  • Functions: hand winding; Middle crown: Winding for time and alarm; time setting; Crown at 2: setting of alarm hand; Crown at 4: alarm on (pressed in)/ alarm off (pulled)
  • Display: hour, minute, sweep second, alarm hand
  • Dial: golden with a lighter edge and circumferential, black printed minute-line; golden indices; circumferential luminous dots
  • Hands: Dauphine, gilded, with lume
  • Second hand: red with counterweight
  • Case shape: round
  • Case diameer (mm): 35
  • Case material: brass, gilded
  • Back: Steel, pressed, two-piece for alarm resonance, internal stop for alarm hammer
  • Bracelet: none


The Junghans J89-2 is made for Bulova and was delivered to the USA. That´s the reason for the reduced use of jewels (only 17), because of the higher costs for customs import. The Junghans J89 has a single and very large mainspring barrel. Therefore a wheel is necessary, that stops the ringing-movment and which prevents complete running down of the mainspring and keeps the watch movement running. The owner of the watch should raise the spring after sounding the alarm, because with the running of the alarm there is loss of the power reserve.




Junghans J89 Katalog 1951; Quelle: Deutsche Gesellschaft für Chronometrie


Junghans J89 Katalog 1951; Quelle: Deutsche Gesellschaft für Chronometrie

The design of the designer Albert Letsche reminds of a chronograph through the three crowns.

Wake-up time: 10 sec

J89-2: 17 jewels for the American market

J89-3: higher movement for strong curved dials