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The Encyclopedia of Horology

Clock · Aircraft clock

Junghans Luftwaffe Aircraft Clock J30 BZ

Partially verified

This Junghans J30 BZ aircraft clock dates to circa 1940 and served within German military aircraft, including fighters such as the Messerschmitt Bf 109, during World War II. Constructed from aluminum and iron, the timepiece features a black dial with Arabic numerals and a rotating bezel designed for flight time tracking. It operates via a manual winding movement. The case includes a clock cover secured by a rotating bayonet closure. Measuring 29 x 61 x 78 x 57 mm, the instrument was produced for the Luftwaffe of the German Wehrmacht to provide precise timekeeping during flight operations. The auction description reports that the clock is currently running, though it exhibits signs of use.

Frontal view of the Junghans J30 BZ aircraft clock, showing the black dial, rotating bezel, and mounting flange.
Frontal view of the Junghans J30 BZ aircraft clock, showing the black dial, rotating bezel, and mounting flange. — Kunst- und Auktionshaus Quedlinburg (via Invaluable). Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.invaluable.com
Category
Clock · Aircraft clock
Maker / attribution
Junghans
Reference
J30 BZ
Catalogue / lot identifier
59
Source-reported date
circa 1940
Source-reported place
Germany

Source-reported attribution and specifications are not independent authentication. A listing does not establish present ownership, current display, availability or permission to reproduce.

Object description

Case and Dial

The timepiece is housed in a circular aluminum and iron case designed for integration into aircraft instrument panels. The mounting flange includes four holes, allowing the clock to be fixed directly into the cockpit. The front is dominated by a black dial featuring bold Arabic numerals. A rotating bezel surrounds the dial, marked for intervals, enabling the user to calculate flight time.

The auction description notes that the clock glass is a replacement and identifies a crack in the bezel specifically at the 60-second marker. Despite these historical repairs and evidence of usage, the object remains in functional state.

Evidence for this section
  • “Aluminum and iron”
  • “black dial with Arabic numerals”
  • “rotating bezel for flight time setting”
  • “clock cover with rotating bayonet closure”
  • “clock glass replaced, bezel cracked at 60 seconds”

Movement and Functionality

The clock utilizes a manual winding movement, designed to meet the technical requirements of the Luftwaffe for aerial navigation. The mechanical assembly is noted by the auction house as being marked. As a tool for the German Wehrmacht, the focus of the construction was on maintaining accuracy in the field.

Documentation indicates that the movement has been verified as operational by the current seller. Its designation, the J30 BZ, is directly associated by the source with its implementation in specific fighter aircraft, including the Messerschmitt Bf 109, where it served as a primary timekeeping instrument.

Evidence for this section
  • “movement marked, manual winding”
  • “clock is running”
  • “The Junghans J30 BZ was installed in German military aircraft”
  • “used in combat and fighter planes, such as the Messerschmitt Bf 109”

Historical Context and Attribution

This clock is attributed to the period circa 1940. It was manufactured for the Luftwaffe of the German Wehrmacht during World War II. The piece is categorized as a precision instrument meant for reliable performance under the conditions of combat flight.

The auction house characterizes the object as a standard piece of equipment for German military aviation.

Evidence for this section
  • “Junghans Luftwaffe aircraft clock J30 BZ, circa 1940”
  • “Präzisions-Borduhr für Flugzeuge der Luftwaffe der Deutschen Wehrmacht”
  • “Besonders geschätzt für ihre Zuverlässigkeit und Robustheit”

Open research questions

  • What is the specific movement caliber number beyond the model designation?
  • Are there secondary marks on the case or dial indicating specific Luftwaffen inventory inventory (e.g. FL numbers)?

Source evidence

Recorded claims and source quotations for Junghans Luftwaffe Aircraft Clock J30 BZ
FieldSource-reported valueSource quotation
MakerJunghans“Junghans”
ReferenceJ30 BZ“J30 BZ”
MaterialsAluminum and iron“Aluminum and iron”
DialBlack dial with Arabic numerals“black dial with Arabic numerals”
Dimensions29 x 61 x 78 x 57 mm“29 x 61 x 78 x 57 mm (H x W x L x D)”

Visible details

  • Rotating bezel for flight time settings
  • Black dial with luminescent-style Arabic numerals
  • Four-bolt flange mount base for cockpit installation
  • Manual winding crown and bayonet-style back cover

Research qualifications

  • The glass is reported as a replacement by the auction description
  • The bezel is cracked at the 60-second position

Photograph identity and source facts were screened before import; rights clearance remains pending.

Consulted source

Junghans Luftwaffe aircraft clock J30 BZ, circa 1940

Reviewed 2026-10-26 · Record 4ed1bb8734

Terms in this record

Glossary explanations for terms named in this object’s record.