With reference 311.30.44.50.01.001, this replica speedmaster 311304 is the stainless-steel co-axial chronograph that bridges the classic Moonwatch lineage with automatic winding convenience. At 42mm in steel, it wears larger than the 42mm Professional but keeps the signature Speedmaster dial layout with two sub-registers, a date window and a tachymeter bezel. The black dial and applied Omega logo follow the brand’s current design language, while the steel bracelet with polished center links carries through the finishing standard set across the modern Speedmaster range.

Technical Overview

• Case diameter: 42mm
• Case material: stainless steel
• Dial: black with applied luminous indices
• Crystal: sapphire with anti-reflective coating
• Bracelet: stainless steel with folding clasp
• Movement: automatic co-axial chronograph
• Functions: chronograph, date, tachymeter

The 311.30 reference uses a column-wheel chronograph mechanism with vertical clutch engagement, which allows the chronograph seconds hand to start smoothly without the slight stutter that horizontal-clutch designs sometimes produce. This mechanical detail is invisible in daily use but reflects the engineering priority Omega places on chronograph precision in this line. A super clone is judged on exactly this kind of detail, because the column wheel is never visible but is felt on every pusher press.

Inside the Movement

The co-axial escapement in this caliber reduces the sliding friction that wears down conventional lever escapements, extending the time between required services. Combined with a silicon balance spring resistant to magnetic interference, the movement addresses two common reliability concerns for mechanical chronographs. The automatic winding rotor eliminates the daily hand-winding ritual required by the Professional Moonwatch, trading a fraction of case thickness for convenience. If you prefer the stealth aesthetic over steel, check the 311.92 black ceramic version which houses a similar caliber in a fully ceramic case. The full Speedmaster collection includes both manual and automatic references across all materials.

What Sets It Apart

The 311.30 occupies a specific niche within the Speedmaster catalog. It gives you automatic winding and a date complication in a recognizable Speedmaster body, without the material premium of ceramic or the heritage restrictions of the hand-wound Professional. The 44.5mm case is larger than the Moonwatch but wears proportionally because the lug-to-lug distance stays manageable on most wrists. The combination of daily convenience and chronograph capability makes this a practical choice for anyone who wants Speedmaster identity in a modern package. This replica speedmaster 311304 fits the role of a primary daily chronograph that does not require adjustment each morning.

OM Factory Standards

OM Factory produces the most accurate replica Speedmaster Chronograph for classic steel references. The 44.50.01.001 requires precise case finishing and dial proportions—OMF specializes in classic Moonwatch aesthetics.

Movement Specifications

• Caliber: automatic chronograph (Cal. 9300 clone)
• Power reserve: 60 hours
• Frequency: 28,800 vph (4Hz)
• Functions: hours, minutes, date, chronograph
• Column-wheel mechanism

Water Resistance

50 meters water resistance handles rain and daily wear.

Frequently Asked Questions

What makes the Speedmaster Chronograph 44.50.01.001 different?

The 44.5mm case houses automatic movement with date function—larger and more practical than classic 42mm manual-wind Moonwatch.

Which factory produces the best Speedmaster 44.50.01.001 clone?

OM Factory leads classic Speedmaster production. On this reference the giveaways are the 44.5mm case profile and the alignment of the date window at 6, and OMF gets both right.

Is this replica Speedmaster automatic?

Yes. Cal. 9300 clone provides automatic winding with 60 hours power reserve.

Does this Speedmaster Chronograph have a date?

Yes. Date window positioned at 6 oclock, integrated with chronograph subdial layout.

Why does this Speedmaster show two counters when the Moonwatch shows three?

Because Cal. 9300 combines the 60-minute and 12-hour counters into the single register at 3 oclock, leaving running seconds at 9 and the date at 6. If a listing for this reference shows three separate counters, it is not built on a 9300.