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The Encyclopedia of Horology

Movement record · Russia

Molnija 3602 family

Partially verified

Large three-quarter-plate pocket-watch calibre derived from a Swiss design

Technical specifications

Diameter
36 mm (approx.)
Height
Not recorded in the sources consulted
Jewels
15 to 18 depending on version
Frequency
18,000 vph (2.5 Hz)
Power reserve
Approx. 40 hours
Winding
Manual, stem wind
Setting
Pendant set
Escapement
Swiss lever
Balance
Monometallic balance
Complications
Subsidiary seconds

Identification features

  • Cyrillic markings and a layout derived from the Cortébert design
  • Very large numbers survive

Known variants

  • Variants with differing jewel counts and finishing

Servicing notes

Cleaning, lubrication, mainspring and pivot work belong with a qualified watchmaker working from calibre-specific documentation. Conserve original parts: replacing a worn component with a modern substitute changes the object, and refinishing plates or dials destroys evidence.

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

Historical significance

An example of technology transfer: a Swiss pocket-watch architecture produced in enormous numbers under Soviet industrial conditions.

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. de Carle, D., Watch and Clock Encyclopedia
  2. Period trade material catalogues and calibre reference compilations (edition-dependent)
  3. Published manufacturer technical documentation where available

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