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Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Clear out junk files and repair common Windows errorsFree Scan →Omega F300 refers to watches using a tuning-fork resonator that oscillates at 300 Hz; it is not a single model or case reference. To identify a particular watch, check its actual movement and function rather than relying on the dial or a case-number family alone. Omega’s calibre 1250 manual also makes clear that these movements need appropriately qualified handling.
What does Omega F300 mean?
The “f300” designation refers to the 300-Hz resonator used in documented Omega tuning-fork watches. In the calibre 1250, electrical impulses maintain the fork’s oscillation. A driving click and index wheel translate that motion into rotation, and a reduction train drives the hands. The result is the smooth, continuous-looking seconds sweep associated with the movement.
F300 is a useful description of a family and technology, not proof of a watch’s exact calibre or originality. Omega’s documented examples include a Seamaster chronometer and the Speedsonic, which have different movements and functions.
How the tuning-fork movement works
Unlike a conventional mechanical watch’s balance and hairspring, the documented calibre 1250 uses a tuning fork as its resonator. Its electrical circuitry and electrodynamic transducer sustain the fork’s motion; the indexing mechanism then converts that motion into movement of the hands.
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| Component | Role in the documented calibre 1250 |
|---|---|
| Tuning-fork resonator | Oscillates at 300 Hz, according to the Omega technical manual. |
| Electrical circuitry and transducer | Maintain the fork’s oscillation with electrical impulses. |
| Driving click and index wheel | Translate the oscillation into rotation. |
| Reduction train | Drives the seconds, minutes, and hours hands. |
The 300-Hz figure and mechanism description apply to the calibre 1250 documentation; do not assume every watch described as electronic uses this same architecture.
Documented Omega F300 examples
Electronic f300 Hz Seamaster chronometer
The Science Museum Group records an Omega Electronic f300 Hz Seamaster chronometer that was sold new in Jersey in 1972. Its collection record describes a Bulova-made escapement controlled by an electrically maintained tuning fork. This is evidence for that specific museum watch, not a launch date for the entire F300 family.
Speedsonic
Omega describes the Speedsonic as its first electronic Speedmaster. The featured example is reference ST 388.0800, a stainless-steel chronograph with calibre 1255 and a 300-Hz tuning fork. Omega gives 1973 as its production year, says it was introduced in late 1973, and notes wider release in 1974. These specifications describe the cited Speedsonic configuration, not every F300 watch.
Rank #2
- A Better Choice: Better than tuning fork mallets/hammers, this tuning fork activator provides better grip, maximum vibration, and longer sound while minimizing knocking noise.
- Product Size: 2.95 inches in diameter, 0.8 inches in thickness, 0.36 pounds, suitable size for easy carrying. Please refer to the size chart for details.
- Perfect Activation: The tuning fork activator can be applied to all tuning fork frequencies, each tuning fork can achieve optimal activation, and provide clear and harmonious sound output.
- Widely Applicable: Suitable for prayer, yoga, and positive thinking training, and is a good helper for relaxation and stress relief.
- Reminder: It is normal if the product has an odor because they are all newly manufactured and made of new vulcanized rubber. Please take the activator out of the sealed bag and place the tuning fork activator in a well-ventilated dry place for a few days before using it. Thank you for your understanding.
| Example | Documented details | Source |
|---|---|---|
| Electronic f300 Hz Seamaster chronometer | A specific example recorded as sold new in 1972; the museum describes its tuning-fork escapement. | Science Museum Group |
| Speedsonic ST 388.0800 | Featured stainless-steel chronograph with calibre 1255; Omega gives 1973 production and describes a late-1973 introduction and wider 1974 release. | Omega |
Calibre 1250 specifications
The Omega calibre 1250 technical manual gives the following specifications. They are historical manual figures, not measurements of any surviving watch.
| Specification | Calibre 1250 manual figure |
|---|---|
| Resonator frequency | 300 Hz |
| Diameter | 29.0 mm |
| Height | 4.8 mm |
| Stated running time | Approximately 15 months |
Read the Omega calibre 1250 technical manual.
How to identify an Omega F300
Do not identify a watch by dial wording or case-number family alone. Specialist reference guidance notes that the “198” sequence includes F300 watches as well as Megasonic and early quartz models. A replacement movement can also complicate dating.
- Record the dial and function. Note the wording and whether the watch displays a date, day-date, or chronograph function.
- Record the full case reference. Treat it as one clue, not confirmation of the movement.
- Ask for a clear movement photograph. Check the calibre marking and movement serial with a knowledgeable watchmaker or reliable reference.
- Compare the components and history. Consider the dial, case, bracelet, movement, serial, and any known replacement or service history together.
- Verify running condition and service claims. A running watch is not necessarily serviced; request evidence rather than relying on a seller’s description.
The specialist reference overview recommends using the movement serial as a dating input while cautioning that a replacement movement’s serial may not date the original watch. See the Omega F300 case-number and dating overview.
Rank #3
- Package:1*440 Hz A tuning fork
- Size: 12 x 1.8 x 0.9cm
- Application: Suitable for violin, mandolin, guitar. Place it on the table, place it on top of the instrument, and adjust your A string to 440 hertz
- Features: Instrument tuning, simple and convenient
- Thoughtful service: If you have any questions about the product, please contact us
Care and service
Omega’s calibre 1250 manual warns against uncasing the movement except by people with the necessary qualifications and equipment, because the operation can disturb the indexing mechanism’s adjustment. It also says the watch should not be demagnetized. These are movement-specific cautions, not routine instructions for all electronic watches.
Before buying or servicing a non-running example, seek a watchmaker who can demonstrate experience with tuning-fork movements. Do not treat a battery change as a complete service, and do not assume current service availability from Omega or any particular provider; the research does not establish that availability.
Buying considerations
Compare F300 watches by the actual calibre and function, not just a shared family label. Also consider the reference, case and dial configuration, bracelet, movement serial, running condition, and service history. The Speedsonic example is a chronograph with calibre 1255, while the calibre 1250 manual covers a different movement.
Rank #4
- Can be used as a spare parts to facilitate the replacement of your movement.
- Type of quartz: Tuning fork type quartz crystal
- Accuracy : ±20 second / month
- Stopwatch 1 sec. basis (Up to 29 min. 59 sec.)
- Powercell Saving Reset Mechanism(PSRM)
Ask the seller for movement evidence and a clear account of service or replacement history. If the movement has not been inspected by a suitably experienced watchmaker, allow for uncertainty; the available sources do not establish current prices, service costs, or repair availability.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.FAQ
What does F300 mean on an Omega watch?
It refers to a 300-Hz tuning-fork resonator in documented Omega F300 watches. It does not by itself identify the exact model or calibre.
Is every Omega F300 a calibre 1250?
No. The dossier documents the calibre 1250 and also the Speedsonic chronograph with calibre 1255. Identify the movement from its marking rather than assuming a calibre from the F300 label.
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- Can be used as a spare parts to facilitate the replacement of your movement.
- Type of quartz: Tuning fork type quartz crystal
- Accuracy : ±20 second / month
- Stopwatch 1 sec. basis (Up to 29 min. 59 sec.)
- Powercell Saving Reset Mechanism(PSRM)
Does an Omega case number in the 198 sequence prove it is an F300?
No. Specialist reference guidance says the sequence also includes Megasonic and early quartz models. Confirm the actual movement and consider whether it may have been replaced.
When was the Omega Speedsonic introduced?
Omega says the Speedsonic was introduced in late 1973, with wider release in 1974. Omega lists 1973 as the production year for its featured ST 388.0800 example.
Can any watchmaker service an Omega F300?
The calibre 1250 manual calls for suitable qualifications and equipment for work that involves uncasing the movement. Ask whether a watchmaker has relevant tuning-fork experience; current service availability was not verified in the research.
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