ETA 2000-305 Movement Lower Index And Regulator Pointer

Product Description

The ETA 2000-305 Movement Lower Index And Regulator Pointer is a genuine Swiss-made component for the ETA 2000 automatic movement. This dual-part set (articles 21-3 and 21-4) forms the regulating system of the balance assembly: the lower index controls the effective length of the hairspring for rate adjustment, while the regulator pointer enables fine timing regulation. These brand new original parts are essential for watchmakers restoring precise timekeeping when the original regulating components become worn or damaged.

Features & Function

• Genuine ETA part – authentic Swiss-made component for the ETA 2000 movement

• Regulating system component – controls hairspring effective length for rate adjustment 

• Two-part set – includes lower index (21-3) and regulator pointer (21-4)

• Critical for timekeeping – enables fine regulation of movement rate

• Direct replacement – drop-in replacement for worn or damaged regulating components

Specifications

• Part Number: 2000-305 / 305

• Article Numbers: 21-3 (Lower Index), 21-4 (Regulator Pointer)

• Compatible Movement: ETA 2000 (including 2000-1 variant)

• Movement Diameter: 19.4 mm (8¾”’)

• Movement Height: 3.6 mm

• Jewels: 20

• Frequency: 28,800 vph (4 Hz)

• Power Reserve: ~42 hours

• Origin: Switzerland (ETA factory part)

• Condition: Brand new

Applications

• Service and overhaul of ETA 2000-series movements

• Regulating system repair – replacing worn or damaged indexes and pointers

• Timekeeping restoration – enabling precise rate adjustment after balance assembly work

• Suitable for professional watchmakers and experienced repair technicians

FAQs

1. Is this a genuine ETA part?

Yes, this is a genuine ETA factory part (reference 2000-305), made in Switzerland. It is not an aftermarket or generic copy .

2. Which movements is this regulating set compatible with?

This lower index and regulator pointer set is specifically designed for the ETA 2000 automatic movement and its variant, the 2000-1 .

3. What is the difference between the lower index and regulator pointer?

The lower index (21-3) controls the effective length of the hairspring, providing coarse rate adjustment. The regulator pointer (21-4) is a separate component that enables fine, precise timing regulation .

Why Choose SOFLY Watch Parts?

• Fast worldwide shipping within 3 business days.

• Competitive pricing on Seiko/Hattori calibers.

• 3,000+ watch movements and parts in stock.

• Trusted by watchmakers worldwide.

• Personalized sourcing support via [email protected] or WhatsApp +86 18620212114.