ETA 7750-8020 Movement Minute Counting Wheel

Quantity	Discount (%)	Price
1 - 2	—	$21.00
3 - 4	5 %	$19.95
5 - 9	7 %	$19.53
10 - 14	10 %	$18.90
15+	15 %	$17.85

Quantity

Discount (%)

Price

1 - 2

—

$21.00

3 - 4

5 %

$19.95

5 - 9

7 %

$19.53

10 - 14

10 %

$18.90

15+

15 %

$17.85

Product Description

This is a genuine ETA 7750-8020 minute counting wheel, an original Swiss-made component corresponding to article number 38 for the ETA/Valjoux 7750 automatic chronograph movement . As part of the chronograph mechanism, this wheel drives the 30-minute counter subdial (typically located at 12 o‘clock) .

This brand new original part is essential for watchmakers restoring proper chronograph minute recording function when the original wheel becomes worn or damaged.

Features & Function

Genuine ETA Part – Swiss factory-original, perfect fit for Caliber 7750.

Chronograph Minute Core – Converts chronograph seconds rotation into minute accumulation, driving the 30‑minute subdial.

Precision Gear – Accurate tooth geometry for smooth, precise minute counter hand movement.

Essential for Service – Replace when the minute counter hand does not move, jumps incorrectly, or resets abnormally.

Compatible Movement – Designed for ETA 7750 (Valjoux 7750) automatic chronograph.

Specifications

Parameter	Details
Part Name	Minute Counting Wheel
Part Number	ETA 7750-8020
Compatible Movements	ETA/Valjoux 7750 automatic chronograph (and variants 7751, 7753, etc.)
Function	Drives the 30‑minute chronograph counter subdial
Origin	Switzerland
Condition	Brand new, genuine

Applications

ETA 7750 (Valjoux 7750) automatic chronograph (common in Breitling, Omega, IWC, Tissot, etc.)
Variants 7751 (full calendar moonphase), 7753 (tri‑compax) – the minute counting wheel is shared
Repair of faults: minute counter hand does not move, jumps inaccurately, or does not reset to zero
Replacement of worn or broken minute counting wheels during movement service

Frequently Asked Questions

1. Is this a genuine ETA minute counting wheel?
Yes. It is a Swiss ETA factory-original part (7750-8020) for Caliber 7750, not a copy.

2. What are the symptoms of a damaged minute counting wheel?
Symptoms: the minute counter hand does not move when the chronograph is started; the hand jumps irregularly (e.g., every 2 minutes or unevenly); the hand does not reset to zero or resets inaccurately.

3. What should I pay attention to during installation?
This wheel sits in the chronograph module, engaging with the seconds counter wheel and the minute cam. Clean the train, align gears, and ensure pivots drop into jewels. Follow the ETA technical guide. Professional installation is strongly recommended.

4. Does this part fit the Sellita SW500?
SW500 is an alternative to 7750. Chronograph parts are often interchangeable, but using dedicated SW500 parts is recommended for best fit. This genuine ETA part may work, but compatibility is not guaranteed.

5. Is lubrication required after replacement?
Yes. Apply a tiny amount of dedicated chronograph lubricant to the gear teeth and pivots as specified in the ETA technical guide.