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

Remark

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.