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The Fortis F-43 Flieger Chronograph Alarm GMT COSC, reference 703.20.92, is a historical 43 mm steel watch built around Fortis’s F-2012 automatic calibre. It combines a chronograph, mechanical alarm, second time zone and two separate power-reserve indicators—one for the timekeeping movement and one for the alarm spring. Period dealer coverage reports a 100-piece edition and COSC certification; those claims should not be mistaken for verification of any individual watch offered today.
What is the Fortis F-43 703.20.92?
It is a limited-edition F-43 Flieger chronograph with an alarm and GMT/UTC second-time-zone display. The reference number 703.20.92 and its specific details come from historical dealer reporting. Fortis’s centenary catalog documents the broader F-43 family, which includes several configurations; family-level information should not automatically be treated as proof of every specification for this reference. Fortis centenary catalog AZ Fine Time historical coverage Historical reference coverage
This is not the current Fortis F-43 Triple-GMT. That modern model has a titanium case and automatic Werk 13 calibre, with GMT/date and a stated 70-hour power reserve; it is a different watch with a different reference and complication set. Fortis F-43 Triple-GMT
What do the complications and two reserve indicators do?
Fortis’s international manual describes calibre F-2012 as providing two separate power-reserve indications—one for the movement and one for the alarm spring—plus a second time zone (UTC/GMT) and an AM/PM indication. In practical terms, the movement indicator concerns energy available to keep the watch running; the alarm indicator concerns energy stored for the alarm. They track separate stores rather than offering two readings of one reserve. Fortis international instruction manual
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Historical coverage of reference 703.20.92 additionally describes an automatic chronograph and alarm, date, small seconds, 30-minute and 12-hour counters, an alarm on/off display, and two spring barrels. The manual is the strongest source for explaining the separate reserve architecture; the reference-specific list is based on period reporting. AZ Fine Time historical coverage
GMT and AM/PM
The GMT/UTC function supplies a second time zone, while the AM/PM indication helps distinguish whether the displayed second-zone time is in its morning or evening half of the day. The Fortis manual establishes these functions, but the available documentation here does not provide a step-by-step setting sequence. Consult the manual supplied with the watch before changing its displays or operating its alarm.
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Chronograph and alarm
The chronograph measures elapsed time using its counters. The alarm is mechanical and has its own energy reserve, which is why the watch has a separate alarm-spring indication. Period reference reporting also identifies an alarm on/off display; exact operation should be checked against the watch’s original instructions. Fortis international instruction manual AZ Fine Time historical coverage
Reported specifications for reference 703.20.92
| Detail | What the sources report |
|---|---|
| Reference | 703.20.92, in historical dealer reporting. AZ Fine Time |
| Movement | Automatic Fortis F-2012 chronograph-alarm-GMT calibre; historical reports state 39 jewels and 28,800 semi-vibrations per hour. AZ Fine Time Historical reference coverage |
| Case | Polished, two-part steel case, reported as 43 mm for this reference. The Fortis catalog confirms 43 mm steel variants in the wider F-43 family. Fortis centenary catalog AZ Fine Time |
| Dial | Silver opaline with blue numerals and hands, according to historical reference reporting. AZ Fine Time |
| Edition size | 100 pieces, according to historical dealer coverage of reference 703.20.92. This is distinct from other F-43 configurations listed in Fortis’s centenary catalog with an edition of 2,012 pieces. Fortis centenary catalog AZ Fine Time |
| COSC | Contemporaneous coverage identifies the watch as COSC certified and says a certificate was supplied. That period claim does not establish the status or paperwork of a particular watch now. AZ Fine Time Historical reference coverage |
| Water resistance | Not established for this exact reference: dealer reporting says 50 m / 5 bar, while Fortis catalog search material lists 200 m / 20 bar for an F-43 family entry. Verify against original reference documentation rather than assuming either rating applies. Fortis centenary catalog AZ Fine Time |
How to assess a specific example
Because this is a historical watch and its exact-reference information is partly based on period dealer reporting, evaluate the individual piece rather than relying on a broad F-43 description. Before buying or arranging service, check:
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- The reference on the watch and accompanying documentation; confirm it is 703.20.92 rather than another F-43 variant.
- Whether the original COSC certificate and papers are present, and whether the details correspond to the watch.
- Condition, provenance and service history, including whether the alarm and chronograph functions operate correctly.
- Original documentation for water resistance; do not infer a firm rating from conflicting family-level and dealer figures.
- Current seller identity, stock and asking price. Historical listings do not establish present availability or value.
Is the Fortis F-43 703.20.92 available now?
Current stock and pricing from Fortis, dealers or Amazon are not established here. Historical prices and listings are not current valuations. If searching for one, use the exact phrase “Fortis F-43 703.20.92 Chronograph Alarm GMT” and ask the seller to substantiate the reference, condition, service history and included papers before treating a listing as a match.
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