ETA 7750-8220 Hammer

Quantity	Discount (%)	Price
1 - 2	—	$8.00
3 - 4	5 %	$7.60
5 - 9	7 %	$7.44
10 - 14	10 %	$7.20
15+	15 %	$6.80

Quantity

Discount (%)

Price

1 - 2

—

$8.00

3 - 4

5 %

$7.60

5 - 9

7 %

$7.44

10 - 14

10 %

$7.20

15+

15 %

$6.80

Product Description

Quantity	Discount (%)	Price
1 - 2	—	$8.00
3 - 4	5 %	$7.60
5 - 9	7 %	$7.44
10 - 14	10 %	$7.20
15+	15 %	$6.80

Genuine ETA 7750-8220 Hammer, Made in Switzerland, brand new — the original factory reset hammer component for the ETA/Valjoux 7750 chronograph movement’s reset mechanism. Precisely engineered to physically drive the chronograph recording pieces back to zero when the reset pusher is activated, the Hammer receives force from the hammer spring and delivers the precise impact that snaps the chronograph counters to zero. An essential replacement part for restoring a worn or damaged chronograph hammer during movement service. Original ETA part — the professional’s choice for genuine chronograph reset restoration.

Features & Function

Genuine ETA 7750-8220 — original Swiss-made factory part, brand new, authentic, part number 7750-8220

Chronograph reset hammer — physically drives the chronograph recording pieces back to zero upon reset activation

Hammer spring-driven — receives precise impact force from the hammer spring (7750-8730) for instant reset snap

Sequential reset operation — works in coordination with operating levers to reset all chronograph counters simultaneously

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

Specifications

Parameter	Value
Brand	ETA (Swatch Group)
Part Number	7750-8220
Component	Chronograph Reset Hammer
Compatibility	ETA/Valjoux 7750 Chronograph Movement
Origin	Made in Switzerland
Type	Original Factory Part (Genuine ETA)
Function	Physically drives chronograph recording pieces to zero; driven by hammer spring upon reset activation
Packing	Original Packing
Condition	Brand New / Genuine ETA

Parameter

Value

Brand

ETA (Swatch Group)

Part Number

7750-8220

Component

Chronograph Reset Hammer

Compatibility

ETA/Valjoux 7750 Chronograph Movement

Origin

Made in Switzerland

Type

Original Factory Part (Genuine ETA)

Function

Physically drives chronograph recording pieces to zero; driven by hammer spring upon reset activation

Packing

Original Packing

Condition

Brand New / Genuine ETA

Applications

Replacement of worn, damaged, or bent Chronograph Hammer in the ETA/Valjoux 7750 movement

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

Repair of hammer mechanism: hammer not striking properly, weak impact, or failure to return

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 genine ETA 7750-8220 Hammer, 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 7750-8220 is the specific Chronograph Reset Hammer 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 Chronograph Hammer do?
A: The Chronograph Hammer (7750-8220) is the physical striker in the chronograph reset mechanism. When you press the reset pusher, the sequence is: Reset pusher → Hammer spring (7750-8730) releases → Hammer (7750-8220) strikes → Chronograph recording pieces snap to zero. The hammer is the physical impact element — it strikes the recording pieces (the hands or counter components) to snap them back to the zero position. Without a functioning hammer, the chronograph counters will not reset regardless of how many times the reset button is pressed.