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The Encyclopedia of Horology

Wristwatch · Mono-pusher chronograph

Lemania Royal Air Force Mono-Pusher Chronograph Series III

Partially verified

This Lemania mono-pusher chronograph, produced in 1970, is a military-issued timepiece designed for the British Royal Air Force. Defined as a 'Series III' model, it is distinguished by its 39.5mm stainless steel asymmetrical case, which incorporates an extended right profile to shield the crown. The watch features a matte black dial with 'Circle T' marking, denoting tritium luminescent material, alongside a broad arrow military insignia and Incabloc shock protection. Operation is controlled by a single pusher at the 2 o'clock position. The caseback includes official Royal Air Force '6BB' issue markings. This timepiece is supplied on a green Phoenix NATO strap. The movement and dial are original, reflecting the specifications required for military service chronographs during this period. The object is presently in running condition, though its past service history is unknown to the vendor.

Front view of the Lemania Series III mono-pusher chronograph showing the matte black dial, syringe hands, and broad arrow insignia.
Front view of the Lemania Series III mono-pusher chronograph showing the matte black dial, syringe hands, and broad arrow insignia. — Craft & Tailored. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.craftandtailored.com
Category
Wristwatch · Mono-pusher chronograph
Maker / attribution
Lemania
Reference
6BB/924-3306
Catalogue / lot identifier
LM6BB3306RAF
Source-reported date
1970
Source-reported place
Switzerland
Source-reported serial
56X/70

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 External Features

The watch is housed in a 39.5mm stainless steel case that follows the asymmetrical Series III design. The case utilizes fixed-bar lugs for strap attachment, consistent with military specifications.

The screw-down caseback carries formal Royal Air Force issue markings under the designation 6BB. Internally, the caseback features a secondary engraving reading 'Stavs Watch,' which the vendor identifies as a probable customization made by a previous owner. The unsigned crown and the single pump-style pusher at the 2 o'clock position are reported as original to the timepiece.

Evidence for this section
  • “39.5mm stainless steel case features the characteristic Series III asymmetrical profile, with an extended right side partially shielding the crown.”
  • “The screw-down caseback retains crisp, fully legible military issue markings, while its interior bears a roughly executed engraving reading “Stavs Watch,” likely a personalization added by a previous owner.”

Dial and Hands

The dial is a matte black finish marked with the 'Circle T' symbol, indicating the presence of tritium luminescent material. The indices retain original tritium plots that have aged to a golden patina.

The syringe-style hands retain their original tritium luminous material. While the hands remain structurally sound, inspection under UV light reveals some loss of luminous material. The dial itself shows age-related spotting consistent with vintage storage and use, without showing significant damage or degradation.

Evidence for this section
  • “The original matte black “Circle T” dial remains in well-preserved vintage condition”
  • “The original syringe-style hands retain the majority of their tritium lume, which has aged to a deeper tan tone, with some lume loss visible under UV light.”

Condition and Function

The watch is described as being in operational condition. The vendor reports that the movement is currently functioning correctly. However, there is no documented record of the timepiece's past service history.

The case exhibits wear consistent with historical use, showing limited evidence of previous polishing. The factory-applied finishes remain largely intact, and the watch is presented on a modern green Phoenix NATO-style strap. No additional accessories or documentation accompany the watch.

Evidence for this section
  • “The watch is running and functioning correctly. Past service history is unknown.”
  • “The impressively preserved Series III asymmetrical case retains strong factory proportions and well-defined finishing, showing honest wear and only minor evidence of prior polishing.”

Open research questions

  • What is the specific caliber designation inside the Series III 6BB/924-3306 case?
  • Can the provenance of the internal caseback engraving 'Stavs Watch' be linked to a specific service branch or individual?

Source evidence

Recorded claims and source quotations for Lemania Royal Air Force Mono-Pusher Chronograph Series III
FieldSource-reported valueSource quotation
BrandLemania“Brand Lemania”
Model6BB/924-3306 Series III“Model 6BB/924-3306 "Series III”
Case diameter39.5mm“39.5mm stainless steel case”
Production year1970“1970 Lemania Royal Air Force Mono-Pusher Chronograph”
Serial number56X/70“Serial 56X/70”
CasebackRoyal Air Force issue markings and private engraving“The screw-down caseback retains crisp, fully legible military issue markings, while its interior bears a roughly executed engraving reading “Stavs Watch,” likely a personalization added by a previous owner.”
DialMatte black with tritium“The original matte black “Circle T” dial remains in well-preserved vintage condition”

Visible details

  • Asymmetrical stainless steel case with integrated crown guard
  • Single chronograph pusher at 2 o'clock
  • Matte black dial with tritium 'Circle T' mark and broad arrow symbol
  • Fixed-bar lugs for NATO-style strap

Research qualifications

  • Uncertain past service history
  • Engraving inside caseback identified as a likely personal addition

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

Consulted source

ساعت مچی Lemania Royal Air Force Mono-Pusher Chronograph رفرنس 6BB/924-3306 مدل Series III

Reviewed 2026-11-02 · Record 51b6bfc8bb

Terms in this record

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

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