Junghans 667.01

Junghans 667.01 | 17jewels.info - The Movement Archive

Junghans 667.01


Even though the Junghans 667 (here in its base version Junghans 667.01 without date indication) was not the very first quartz caliber for wristwatches from Junghans (its predecessor, the caliber 666 was made in low quantities only), it was the first one to bypass the one million mark, regarding its production quantity.

The complete series 667 was made between 1975 and 1981, the caliber Junghans 667.01 between 1975 and 1978.

Junghans 667.01: base plate

base plate

It already shows visible signs of a very efficient production, but is still high-quality made, with in total nine bearing jewels.

Junghans 667.01: plastic assembly capsule

plastic assembly capsule

The center minute wheel is located directly on the base plate, all other gears are housed in a kind of plastic assemply capsule, which is put between the pillars of the movement skeleton.

Junghans 667.01: base plate with center minute wheel

base plate with center minute wheel

You can see the conventional gear train with its large gears, consisting of the rotor, reduction wheel, seconds wheel, third wheel and indirectly driven center seconds wheel. The third wheel engages with the minute wheel.

A small spring acts a brake for the center seconds pinion and avoids fluttering of the center seconds hand.

Junghans 667.01: gear train

gear train

The free space will be occupied by the large coil, which is very sensitive, unfortunately, on both specimen in the archive, it is defective.

Junghans 667.01: side view of the gear train

side view of the gear train

The electronics module is quite simple. On its lower side, there’s the 32kHz quartz and an IC of type NEC 8106YA, on its upper side a capacitor and the trimmer capacitor, which tunes the quartz frequency to exactly 32768Hz.

Junghans 667.01: electronics module

electronics module

There’s not much to say about the dial side. We have a kind of yoke keyless works, but the hands setting occurs on the base plate by just pulling the stem, whose end engages then with the hand setting wheel.

Junghans 667.01: Junghans 667.01: Dial side

Junghans 667.01: Dial side

This movement shows, that already in 1975, the development of the quartz wrist watch was quite finished. Since then, hardly anything changed construction-wise, only the execution is much, much cheaper.

Technical data

Caliber base:Junghans 667.00
Size:11 1/2''' (measured: 25,6mm)
Frequency:32768 Hz
Number of jewels:9
  • rotor, transmission axle, seconds wheel, third wheel, center second pinion
  • center minute wheel
Construction type:pillar construction
Winding mechanism:yoke winding system
Attachment of setting lever:plugged
Setting lever spring:1 hole(s)
  • SCI (indirect center seconds)
Production period:1975 - 1978
Inventory number:23012

Usage gallery

Junghans 667.01: Junghans gents quartz watch, model 010/2753

Junghans gents quartz watch, model 010/2753

Junghans 667.01: Junghans gents quartz watch, modell 010/4726.44 (seconds hand missing)

Junghans gents quartz watch, modell 010/4726.44 (seconds hand missing)

The movement with the white dial is a kind donation from Lars Schröder, and the model with the black dial is a kind donation from a danish watch maker. Thank you very much for your great support of the movement archive!