ETA 7750-8062 Minute Counter Driving Wheel

Product Description

Genuine ETA 7750-8062 Minute Counter Driving Wheel, Made in Switzerland, brand new — the original factory transmission gear for the ETA/Valjoux 7750 chronograph movement’s 30-minute counter mechanism. Precisely engineered to receive rotation from the chronograph seconds wheel and transmit it at the proper reduction ratio to drive the minute counter hand, this driving wheel positions between the chronograph seconds wheel and the minute counter wheel to deliver precise rotational transmission for accurate 30-minute timing. An essential replacement part for restoring a worn or damaged minute counter driving wheel during movement service. Original ETA part — the professional’s choice for genuine chronograph counter mechanism restoration.

Features & Function

• Genuine ETA 7750-8062 — original Swiss-made factory part, brand new, authentic, part number 7750-8062
• Minute counter driving wheel — receives rotation from chronograph seconds wheel and transmits to drive the 30-minute counter hand
• Chronograph counter transmission — positioned between chronograph seconds wheel and minute counter wheel; delivers proper reduction ratio
• 30-minute counter mechanism — drives the 30-minute chronograph register at 12 or 3 o’clock position depending on dial layout
• Original factory quality — exact tooth profile and dimensional specifications for perfect fit in the ETA/Valjoux 7750 movement

Specifications

Applications

• Replacement of worn, damaged, or stripped Minute Counter Driving Wheel in the ETA/Valjoux 7750 movement
• Repair of 30-minute counter failures: minute counter not advancing, skipping, or running erratically
• Repair of chronograph counter mechanism: driving wheel engagement failure or tooth damage
• Professional movement service, overhaul, and chronograph restoration
• Certified watchmaker and service center parts supply

FAQ

Q1: Is this a genuine ETA part?
A: Yes — this is a genuine ETA 7750-8062 Minute Counter Driving Wheel, Made in Switzerland, brand new. It is an original factory part from ETA (Swatch Group), the world’s leading movement manufacturer. Not a generic or replica part.

Q2: How do I confirm this part fits my movement?
A: Confirm your movement is an ETA/Valjoux 7750 chronograph. The part number 7750-8062 is the specific Minute Counter Driving Wheel for the 30-minute chronograph register. Common brand applications include: IWC Portugieser Chronograph, Omega Speedmaster (older 7750 variant), Tag Heuer Monaco, Breitling Navitimer, and many other chronographs using the Valjoux/ETA 7750 platform.

Q3: What does the Minute Counter Driving Wheel do?
A: The Minute Counter Driving Wheel (7750-8062) is the transmission gear in the chronograph’s 30-minute counter mechanism. The chronograph counter gear train is: Chronograph seconds wheel → Minute Counter Driving Wheel → Minute Counter Wheel → 30-minute counter hand. This driving wheel receives rotation from the chronograph seconds wheel and transmits it at the proper reduction ratio so that every 60 seconds of chronograph running translates to 1 minute advancement on the 30-minute counter. The reduction ratio is critical — without the correct ratio, the 30-minute counter would advance too fast or too slow. Without this driving wheel, the 30-minute counter will not advance at all.

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