ETA 7750-8139 Operating Lever

Quantity	Discount (%)	Price
1 - 2	—	$15.00
3 - 4	5 %	$14.25
5 - 9	7 %	$13.95
10 - 14	10 %	$13.50
15+	15 %	$12.75

Quantity

Discount (%)

Price

1 - 2

—

$15.00

3 - 4

5 %

$14.25

5 - 9

7 %

$13.95

10 - 14

10 %

$13.50

15+

15 %

$12.75

Product Description

Quantity	Discount (%)	Price
1 - 2	—	$15.00
3 - 4	5 %	$14.25
5 - 9	7 %	$13.95
10 - 14	10 %	$13.50
15+	15 %	$12.75

Genuine ETA 7750-8139 Operating Lever, Made in Switzerland, brand new — the original factory mechanical lever component for the ETA/Valjoux 7750 chronograph movement’s reset mechanism. Precisely engineered to transmit reset pusher force to the chronograph recording hammer in precise coordination with other operating levers, the Operating Lever ensures synchronized reset of the chronograph counters upon reset activation. An essential replacement part for restoring a worn or damaged operating lever during movement service. Original ETA part — the professional’s choice for genuine chronograph reset coordination restoration.

Features & Function

Genuine ETA 7750-8139 — original Swiss-made factory part, brand new, authentic, part number 7750-8139

Operating lever — transmits reset pusher force to the chronograph recording hammer for synchronized counter reset

Sequential reset coordination — works in precise sequence with other operating levers to reset all chronograph counters simultaneously

Chronograph reset mechanism — integral lever component in the ETA 7750 cam-switching chronograph platform

Original factory quality — exact dimensional and pivot specifications for perfect fit in the ETA/Valjoux 7750 movement

Specifications

Parameter	Value
Brand	ETA (Swatch Group)
Part Number	7750-8139
Component	Operating Lever
Compatibility	ETA/Valjoux 7750 Chronograph Movement
Origin	Made in Switzerland
Type	Original Factory Part (Genuine ETA)
Function	Transmits reset pusher force to chronograph recording hammer; ensures synchronized chronograph counter reset
Packing	Original Packing
Condition	Brand New / Genuine ETA

Parameter

Value

Brand

ETA (Swatch Group)

Part Number

7750-8139

Component

Operating Lever

Compatibility

ETA/Valjoux 7750 Chronograph Movement

Origin

Made in Switzerland

Type

Original Factory Part (Genuine ETA)

Function

Transmits reset pusher force to chronograph recording hammer; ensures synchronized chronograph counter reset

Packing

Original Packing

Condition

Brand New / Genuine ETA

Applications

Replacement of worn, damaged, or bent Operating Lever in the ETA/Valjoux 7750 movement

Repair of chronograph reset failures: chronograph counters not resetting, partial reset, or reset sequence misalignment

Repair of lever mechanism: lever not engaging properly or failure to transmit reset force

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 7750-8139 Operating Lever, 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 7750-8139 is the specific Operating Lever for this movement. 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 Operating Lever do?
A: The Operating Lever (7750-8139) is a mechanical lever in the chronograph reset mechanism that transmits the reset pusher force to the chronograph recording hammer. When you press the reset pusher, the force travels through the operating levers to the recording hammers, which then strike the chronograph counters back to zero. The operating lever is the force transmission link between the pusher and the hammer — without it, the reset force cannot reach the recording hammer and the chronograph counters will not reset.