Sellita SW200-1 Mechanical Movement, 26 Jewels, 41-Hour Power Reserve

Color

Brand

Clear

Quantity	Discount (%)	Price
1 - 2	—	$180.00
3 - 4	5 %	$171.00
5 - 9	7 %	$167.40
10 - 14	10 %	$162.00
15+	15 %	$153.00

Quantity

Discount (%)

Price

1 - 2

—

$180.00

3 - 4

5 %

$171.00

5 - 9

7 %

$167.40

10 - 14

10 %

$162.00

15+

15 %

$153.00

Product Description

The Sellita SW200-1 is a high-quality Swiss-made automatic mechanical movement, measuring 25.6mm in diameter (11.5‴) with a thickness of 4.6mm. It features 26 jewels, a beat rate of 28,800 vibrations per hour (4 Hz), and a power reserve of approximately 41 hours. Offering hours, minutes, center seconds, and a quick-set date function with a stop-second (hacking) device, the SW200-1 is widely recognized as the direct successor to the ETA 2824-2, with nearly identical dimensions and construction. It has become the go‑to movement for numerous Swiss independent brands in their mid‑to‑high-end collections.

Features & Function

Precision timekeeping: Operating at 28,800 vph (4 Hz), the balance wheel oscillates eight times per second, ensuring a smooth seconds hand sweep. Daily rate varies by grade (Standard: ±12s/day to Top/Chronometer: ±4s/day).
Long power reserve: Approximately 41 hours of power reserve meets daily wear needs; amplitude at full wind ranges from 270°‑315° (lift angle set to 50°).
Hacking (stop‑seconds): Pulling the crown to the time‑setting position stops the balance wheel via a hacking lever, allowing precise synchronisation with a reference time. The hacking mechanism is actuated by the stem’s setting cam, which pushes the hacking lever against the balance rim.
Quick‑set date: Semi‑instantaneous date display at 3 o‘clock; the date can be advanced quickly without repeatedly turning the hands.
Bidirectional automatic winding: Equipped with a ball‑bearing rotor, the bidirectional winding system offers high efficiency and comfortable daily wear.
Anti‑magnetic performance: The base movement is not specially shielded (approx. 4,800 A/m). A customisable anti‑magnetic version with a soft‑iron inner cage can increase protection to around 500 Gauss (approx. 40,000 A/m).
Multiple grades: Available in Standard, Elaboré, Top, and Chronometer grades, meeting a wide range of accuracy requirements.
ETA 2824‑2 compatibility: The SW200-1 is fully compatible with the ETA 2824‑2 in dimensions, dial feet positions, stem specifications, and most parts, making it a direct drop‑in replacement.

FAQ

Q1: Why does the rotor spin when I manually wind the watch?
A: This is known as the “helicopter effect”, caused by dried lubricant or worn pawls inside the reversing wheels. When the reversing wheels cannot disengage properly, the manual winding torque drives the rotor. The solution is to clean the automatic module and apply the specified dry film lubricant; if the reversing wheels are worn, they must be replaced.

Q2: The movement runs, but amplitude is consistently low (<220°)
A: Low amplitude without rate instability usually points to dry lubrication at the balance staff/shock absorber interface or slight mainspring fatigue. Check the automatic module reversing wheels for oil creep first. If all else appears normal, replace the mainspring. True amplitude below 200° (with the correct 50° lift angle setting) is a clear indication that a full service is overdue.

Q3: Does the SW200-1 require regular servicing? What is the service interval?
A: Yes. A full service (disassembly, cleaning, re‑lubrication) is recommended every 3‑5 years. While some movements may run well for 5‑7 years, lubricants degrade over time and will accelerate wear once they dry out. The SW200‑1 is easy to maintain, with abundant parts availability, making it suitable for long‑term wear. Compared to ETA’s tightening parts supply, the SW200‑1 offers a clear advantage in parts sourcing.

Q4: What lift angle should I set on my timing machine?
A: Set the lift angle to 50°. An incorrect lift angle (e.g., 53° or 48°) will cause amplitude readings to be off by 20° or more, leading to a false assessment of the movement‘s health.