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The Encyclopedia of Horology

Movement record · Switzerland

Peseux 7001

Partially verified

A very thin manual-wind wristwatch calibre with an open, easily accessible bridge layout, widely used in dress watches and extensively adopted as a teaching and modification base.

Technical specifications

Diameter
Approx. 23.3 mm (10½ lignes)
Height
Approx. 2.5 mm
Jewels
17
Frequency
21,600 vph (3 Hz)
Power reserve
Approx. 42 hours
Winding
Hand wind
Setting
Pull-out crown
Escapement
Swiss lever
Balance
Monometallic balance with Nivarox-type hairspring
Complications
Subsidiary seconds

Identification features

  • Extremely low height for a hand-wound calibre with small seconds
  • Peseux or ETA 7001 marking on the bridge

Known variants

  • ETA 7001
  • Decorated and skeletonised versions produced for individual brands

Servicing notes

One of the more approachable modern calibres for learning, though the thin plates and fine pivots punish careless handling.

General guidance only. Antique movements should be serviced by a qualified watchmaker.

Historical significance

The default base calibre for thin hand-wound watches in the later twentieth century, and a standard teaching movement.

Diagram

top plate or bridgespillar platebalance and cockwheel train between the plates
Schematic: plate and bridge layout. An outline schematic drawn to show the arrangement of the parts discussed here. It is not a dimensioned working drawing and does not depict a particular maker's calibre.

Sources & references

  1. ETA technical documentation
  2. Jewel counts and finishing vary between brand-specific versions.

Where sources disagree, the disagreement is stated rather than resolved silently.