ETA 7750-440 Yoke Spring

Quantity	Discount (%)	Price
1 - 2	—	$4.00
3 - 4	5 %	$3.80
5 - 9	7 %	$3.72
10 - 14	10 %	$3.60
15+	15 %	$3.40

Quantity

Discount (%)

Price

1 - 2

—

$4.00

3 - 4

5 %

$3.80

5 - 9

7 %

$3.72

10 - 14

10 %

$3.60

15+

15 %

$3.40

Product Description

Quantity	Discount (%)	Price
1 - 2	—	$4.00
3 - 4	5 %	$3.80
5 - 9	7 %	$3.72
10 - 14	10 %	$3.60
15+	15 %	$3.40

Genuine ETA 7750-440 Yoke Spring, Made in Switzerland, brand new — the original factory spring component for the ETA/Valjoux 7750 chronograph movement’s crown mechanism. Precisely engineered to apply constant spring tension to the setting lever yoke, the yoke spring keeps the yoke positively engaged with the castle wheel and enables smooth crown position selection between winding and time-setting modes. An essential replacement part for restoring faulty or fatigued yoke spring during movement service. Original ETA part — the professional’s choice for genuine crown mechanism restoration.

Features & Function

Genuine ETA 7750-440 — original Swiss-made factory part, brand new, authentic, part number 7750-440

Yoke spring — applies spring tension to keep the setting lever yoke positively engaged with the castle wheel

Smooth crown position selection — ensures the crown transitions smoothly between winding and time-setting positions without slipping

Reliable crown locking — maintains consistent spring pressure for positive crown engagement in all positions

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

Specifications

Parameter	Value
Brand	ETA (Swatch Group)
Part Number	7750-440
Component	Yoke Spring
Compatibility	ETA/Valjoux 7750 Chronograph Movement
Origin	Made in Switzerland
Type	Original Factory Part (Genuine ETA)
Function	Applies spring tension to the setting lever yoke for crown position selection and castle wheel engagement
Packing	Original Packing
Condition	Brand New / Genuine ETA

Parameter

Value

Brand

ETA (Swatch Group)

Part Number

7750-440

Component

Yoke Spring

Compatibility

ETA/Valjoux 7750 Chronograph Movement

Origin

Made in Switzerland

Type

Original Factory Part (Genuine ETA)

Function

Applies spring tension to the setting lever yoke for crown position selection and castle wheel engagement

Packing

Original Packing

Condition

Brand New / Genuine ETA

Applications

Replacement of worn, fatigued, or broken yoke spring in the ETA/Valjoux 7750 movement

Repair of crown mechanism failures: crown slipping out of position, failure to engage winding or setting mode

Repair of spring-related issues: inconsistent crown tension, crown not returning to winding position

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 7750-440 Yoke Spring, 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 7750-440 is the specific yoke spring 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 yoke spring do?
A: The yoke spring is a tiny precision spring that provides spring tension to the setting lever yoke. Its job is to: (1) Keep the yoke pressed against the castle wheel — ensuring the crown can always engage the winding mechanism when pushed in. (2) Provide positive spring pressure for the crown’s position selection — when the crown is pulled out, the yoke moves into setting position with spring assistance. A worn or broken yoke spring causes: the crown slipping out of winding position, inconsistent engagement, or failure to return to the neutral winding position when released.