Junghans J89; Junghans 689.70

Caliber Junghans J89; Junghans 689.70

Minivox

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Junghans J89; Junghans 689.70; Minivox; Front

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Junghans J89; Junghans 689.70; Minivox; Werk; movement

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Junghans J89; Junghans 689.70; Minivox; Rückseite;Back

  • Art: Herrenarmbanduhr; Armbandwecker
  • Hersteller lt. Zifferblatt: Junghans
  • Markenzeichen/Aufdruck ZB: JUNGHANS 20 JEWELS / Boden: STAINLESS STEEL BACK; SHOCK PROOF; 20 MIKRON; seitlich 8-strahliger Stern mit J in der Mitte, scheinbar manuell nachgezogen
  • Anzahl Steine: 21 (Sekundenzeigerwelle zusätzlich rubingelagert)
  • Hemmung: Steinanker
  • Unruh: Schraubenunruh
  • Stoßsicherung: Junghans II
  • Besonderheiten: Armbandwecker
  • Schwingungen: 18.000 A/h
  • Maße Werk: 12.5”’
  • Produktionszeit: 1951 – 1958; hier späte Version
  • Funktionen: Handaufzug; Mittlere Krone: Aufzug Gangfeder/Weckerfeder (gleich); Zeigerstellung: Stunde, Minute; Krone bei 2: Stellung des Weckerzeigers; Krone bei 4: Wecker an/aus
  • Anzeige: Stunde, Minute, Zentralsekunde, Weckzeit
  • Zifferblatt: weiß; goldene gerade Zahlen, aufgelegt; goldene Keilindexe statt ungerader Zahlen; umlaufend goldene Punktindexe
  • Zeigerform: Dauphine ähnlich, vergoldet, mit Leuchtmasse; pfeilförmiger, goldener Weckzeiger mit roter Spitze
  • Sekundenzeiger: rot mit Gegengewicht
  • Gehäuseform: rund
  • Gehäusedurchmesser (mm): 35
  • Gehäusematerial: Messing, vergoldet
  • Boden: Stahl, gepresst, zweiteilig als Wecker Resonanz, innenliegender Anschlag für Weckhämmerchen, nach zentralführend
  • Band: ohne

Remark:

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.

 

Function:

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Junghans J89 Minivox movement dialside; picture/collection: Jens Finkbeiner

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Junghans J89 Katalog 1951; Quelle: Deutsche Gesellschaft für Chronometrie

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Junghans J89 Katalog 1951; Quelle: Deutsche Gesellschaft für Chronometrie

  • Middle crown: winding mainspring/alarm spring (same); hands setting minute, hour
  • Crown at 2 o'clock: setting of the alarm hand. On older models, the long alarm hand points to the second dial scale (outside), which is divided into 10-minute increments.
  • Crown at 4 o'clock: alarm on/off; when crown is pressed: alarm "on", when crown is pulled out: alarm "off", thus ensuring that the alarm will ring even if the crown is accidentally pushed inwards. It is therefore less likely that the crown will be pulled out inadvertently.

The design of the constructor Albert Letsche reminds of a chronograph due to the three crowns.
Alarm duration: 10 sec
J89-2: 17 stones for the American market
J89-3: high hand movement for strongly convex dial

Versions:

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Junghans J89; Junghans 689.70; Minivox; early version

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Junghans J89; Junghans 689.70; movement; early version

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Junghans J89; Junghans 689.70; Minivox; late version

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Junghans J89; Junghans 689.70; movement; late version

In the early models, the outer scale shows a 10-minute division, but in later models this design feature is missing. In addition, you often find the imprint "Minivox" on the dial of the earlier models, later on, there are only 20 jewels on the dial.

And this, although later versions of the movement were usually equipped with an additional ruby (actually 21 jewels) for the bearing of the fourth wheel by the friction spring.

Another difference between younger and older movements can be seen in the surface structure of the movements, the early movements are grained and gilded, the later ones are only finely polished and rhodium-plated.

Weitere Beispiele

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Junghans J89; Junghans 689.70; Foto: M. Bütow

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Junghans J89; Junghans 689.70; Foto: M. Bütow

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Junghans J89; Junghans 689.70; Foto/Sammlung: W. Ingerl

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Junghans J89; Junghans 689.70; Foto/Sammlung: W. Ingerl

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Junghans J89; Junghans 689.70; Foto/Sammlung: W. Ingerl

Hier noch weitere Versionen des Junghans J89; Junghans 689.70.

Wer Informationen zu einem weiteren Armbandwecker von Junghans sucht, der ist hier richtig: Junghans top timer; AS 5008