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The Encyclopedia of Horology

Serial-number guide

Sessions Clock Company Serial Numbers

Needs research

What a Sessions Clock Company serial number can establish, what it cannot, and how to record a date estimate another researcher could check.

Diagram

maker or gradeserialcase hallmarksimport and assay marks
Schematic: where markings are found. 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.

Method

Reading the number, step by step

  1. 1. Find the movement number

    Factory-cased clocks; movement and case belong together, but neither carries a reliably dateable serial.

  2. 2. Understand what it encodes

    Stamped numbers on Sessions movements are not part of a published chronological serial system.

  3. 3. Judge how precise the date can be

    Limited: catalogue and model references give period ranges; precise year dating from numbers alone is not supported by published evidence.

  4. 4. Check the records behind the tables

    Twentieth-century American mass production with limited surviving serial documentation; dating is generally by model and movement type.

Quick facts

Manufacturer
Sessions Clock Company
Dating confidence
Estimate only — see notes
Editorial status
Needs research

Sources & references

  1. Period Sessions trade catalogues
  2. American clock reference literature

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

Limits

What the number does not prove

Questions

Frequently asked

Where is the serial number on a Sessions Clock Company watch?
Factory-cased clocks; movement and case belong together, but neither carries a reliably dateable serial.
What do Sessions Clock Company serial numbers mean?
Stamped numbers on Sessions movements are not part of a published chronological serial system.
How accurate is dating a Sessions Clock Company watch by serial number?
Limited: catalogue and model references give period ranges; precise year dating from numbers alone is not supported by published evidence.
Where are Sessions Clock Company production records held?
Twentieth-century American mass production with limited surviving serial documentation; dating is generally by model and movement type.

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