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The Encyclopedia of Horology

Wristwatch · Monopusher chronograph

Lemania Monopusher Chronograph 6BB

Partially verified

This Lemania monopusher chronograph is a military-issued timepiece featuring a 38mm asymmetric steel case. Produced in Switzerland, the watch is powered by a hand-wound calibre 2220 movement. The watch includes a two-register black dial marked with the Broad Arrow and a Circle T, which indicates the application of tritium luminous material at the numeral positions and on the hands. The timepiece is fitted with a leather strap and features specific military case back engravings indicating issuance to the British Royal Air Force. The watch is presented as having been serviced by the vendor's watchmaker and is described by the auction description as being in very good condition with signs of previous wear consistent with its military history.

The Lemania Monopusher Chronograph 6BB showing the asymmetric case profile, the single pusher, and the black two-register dial.
The Lemania Monopusher Chronograph 6BB showing the asymmetric case profile, the single pusher, and the black two-register dial. — Bulang & Sons. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.bulangandsons.com
Category
Wristwatch · Monopusher chronograph
Maker / attribution
Lemania
Reference
6BB
Catalogue / lot identifier
W3868
Source-reported date
mid-1960s
Source-reported place
Switzerland

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 case design incorporates a single pusher mechanism located above the winding crown to operate the chronograph functions. The condition of the exterior shows various marks and signs of wear accumulated during its service life.

The dial is finished in matte black and displays a two-register layout. It features painted Arabic numerals at the 12 and 6 o'clock positions, with other hour markers indicated by luminous dots. The dial bears the Broad Arrow symbol and a 'Circle T' marking, which serves to identify the presence of tritium luminous compound on the dial indices and the hands.

Evidence for this section
  • “38mm steel asymmetric case”
  • “the matte black dial features both the Circle T marking, indicating the use of tritium luminous material, and the distinctive Broad Arrow.”

Movement and Functionality

The timepiece is driven by a Lemania calibre 2220 hand-wound chronograph movement. This movement is designed for two-register functionality, allowing for the measurement of elapsed time.

The watchmaker responsible for the current listing reports that the movement has been fully serviced to ensure functionality.

Evidence for this section
  • “Hand wound cal.2220 movement”
  • “Fully serviced by our watchmaker”

Military Specification and Provenance

The watch was commissioned for the British Royal Air Force as indicated by the '6BB' reference marking and military engravings on the case back. These markings adhere to the specifications set out by the British Ministry of Defence during the mid-1960s.

The auction description reports that these engravings and the general aesthetic condition of the watch are consistent with its historical issuance to British military organizations.

Evidence for this section
  • “Issued to the British Royal Air Force”
  • “Full military case back engravings for the British armed forces”

Open research questions

  • What is the specific issue or serial number engraved on the case back?
  • Does the calibre 2220 movement retain its original internal components as issued during the mid-1960s?

Source evidence

Recorded claims and source quotations for Lemania Monopusher Chronograph 6BB
FieldSource-reported valueSource quotation
MakerLemania“Vendor: Lemania”
Model reference6BB“Lemania Monopusher Chronograph "6BB”
Case materialsteel“38mm steel asymmetric case”
Movement typehand wound“Hand wound cal.2220 movement”
Luminous materialTritium“Circle T marking, indicating the use of tritium luminous material”
Datemid-1960's“Dates to mid-1960's”
OriginSwitzerland“The company was established in L’Orient, Switzerland”
Issued toRoyal Air Force“Issued to the British Royal Air Force”

Visible details

  • Asymmetric stainless steel case design
  • Single pusher located above the crown
  • Matte black dial with Broad Arrow symbol
  • Circle T marking above the 6 o'clock position

Research qualifications

  • Exact year of production is not specified beyond mid-1960s
  • History of specific military usage is not documented in detail beyond general Royal Air Force association

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

Consulted source

Lemania Monopusher Chronograph 6BB Asymmetric Case Military Chronograph Black Dial issued to the Royal Air Force

Reviewed 2026-11-02 · Record 2772af7355

Terms in this record

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

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