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The Encyclopedia of Horology

Serial-number guide

Junghans Serial Numbers

Needs research

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

Junghans movement markings

Junghans Mega
Junghans Mega — J. Lunau, CC BY-SA 3.0. Wikimedia Commons file page
Junghans Additionsstoppuhr, 1960er-Jahre (2 qu)
Junghans Additionsstoppuhr, 1960er-Jahre (2 qu) — Lothar Spurzem, CC BY-SA 2.0 de. Wikimedia Commons file page
Junghans Armbanduhr 1950 (2)
Junghans Armbanduhr 1950 (2) — Lothar Spurzem, CC BY-SA 2.0 de. Wikimedia Commons file page

Movement markings — maker name, grade, serial number and jewelling — are the evidence base for any serial-number attribution.

Method

Reading the number, step by step

  1. 1. Find the movement number

    As with other German and Swiss manufacturers of the period, case and movement numbers are generally independent, and clock cases in particular were frequently produced or finished by separate cabinetmaking suppliers; a case style or label documents the case supply, not the movement's exact date.

  2. 2. Understand what it encodes

    Where a movement carries a serial number, published community research suggests it can indicate an approximate production batch for some product lines, but coverage is uneven across the company's very long and varied output (clocks, pocket watches, wristwatches and later quartz movements), and no single authoritative public table covers the full range.

  3. 3. Judge how precise the date can be

    Needs-research by default: identify the specific product line and approximate era from trademark/logo style and calibre construction first, then consult the specialist reference works for that specific category rather than assuming a general Junghans serial chart applies.

  4. 4. Check the records behind the tables

    Junghans, one of the largest German clock and watch manufacturers historically, does not maintain a publicly accessible factory-ledger serial database of the kind offered by some Swiss houses; dating relies principally on movement calibre numbers, case-back or movement stampings (including the well-documented Junghans trademark/logo variants used across different periods), and, for wristwatches, published calibre-identification references compiled by specialist collectors rather than a sequential serial-to-year table.

Quick facts

Manufacturer
Junghans
Dating confidence
Estimate only — see notes
Editorial status
Needs research

Sources & references

  1. NAWCC published research on German clock and watch manufacturers, including Junghans
  2. Community-maintained Junghans calibre and trademark reference compilations (secondary, approximate)

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 Junghans watch?
As with other German and Swiss manufacturers of the period, case and movement numbers are generally independent, and clock cases in particular were frequently produced or finished by separate cabinetmaking suppliers; a case style or label documents the case supply, not the movement's exact date.
What do Junghans serial numbers mean?
Where a movement carries a serial number, published community research suggests it can indicate an approximate production batch for some product lines, but coverage is uneven across the company's very long and varied output (clocks, pocket watches, wristwatches and later quartz movements), and no single authoritative public table covers the full range.
How accurate is dating a Junghans watch by serial number?
Needs-research by default: identify the specific product line and approximate era from trademark/logo style and calibre construction first, then consult the specialist reference works for that specific category rather than assuming a general Junghans serial chart applies.
Where are Junghans production records held?
Junghans, one of the largest German clock and watch manufacturers historically, does not maintain a publicly accessible factory-ledger serial database of the kind offered by some Swiss houses; dating relies principally on movement calibre numbers, case-back or movement stampings (including the well-documented Junghans trademark/logo variants used across different periods), and, for wristwatches, published calibre-identification references compiled by specialist collectors rather than a sequential serial-to-year table.

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