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Movement · Sellita · automatic

Sellita SW330-2 movement

Sellita SW330-2 is an automatic movement by Sellita: 26.2 mm1 across, 4.1 mm1 high, 251 jewels, beating at 28,800 bph1, 56 h1 of power reserve.

Sources checked · How we source numbers
Sellita SW330-2: movement drawingSellita SW330-2, dial side, to scale: movement diameter 26.2 mm; casing diameter 25.6 mm; size 11½‴; height 4.1 mm; hour, minute, second hand hole Ø — (unknown).movement Ø 26.2casing Ø 25.611½‴ as printed · Ø 26.2 = 11.61‴4.1SIDE · SECTION · height 4.1Ahour, minute, second hand hole Ø —DETAIL A · 10:1
Sellita SW330-2, dial sideDrawing from data, not a photo · mm

SW330-2 at a glance

Diameter
26.2 mm1
Height
4.1 mm1
Jewels
251
Beat rate
28,800 bph1
Power reserve
56 h1
Accuracy
±5 s/day1
Lift angle
51°1

New to the terms? Read quartz vs automatic or watch movement types.

Setting and servicing the SW330-2

The figures a watchmaker or a timegrapher needs for the SW330-2, as Sellita prints them.

Lift angle
51°1
Accuracy (maker)
±5 s/day1Elaboré grade. Positions (4) CH, 6H, 9H, 3H. Top grade 4 ±4 s/d (5 positions)
Positional difference
20 s/day1Elaboré grade. Top grade 15 s/d
Power reserve
56 h1
Hacking seconds
Yes1
Hand winding
Yes1
Crown turns to full wind
711

What fits the SW330-2

The figures a dial, hands or case must match for the SW330-2, as Sellita prints them.

Casing diameter
25.6 mm1

Same family at Sellita

How each differs from the SW330-2, worked out from the figures on its own page.

What can replace the SW330-2

7 calibres of the ETA 28xx and Sellita SW200 / SW300 group checked against the SW330-2: diameter, height, hand holes, date window, crown and dial feet. A verdict marked “not confirmed” lacks one of those figures for the SW330-2 or the other calibre.

Not published, so not checked in several comparisons:

  • hand holes for SW330-2, ETA 2893-2, ETA 2824-2, ETA 2836-2, ETA 2892-A2, SW300-1 and SW220-1
  • date position for SW330-2, ETA 2893-2, SW300-1 and SW220-1
  • crown position for SW330-2, ETA 2893-2, ETA 2824-2, ETA 2836-2, ETA 2892-A2, SW200-1, SW300-1 and SW220-1
  • dial feet for SW330-2, ETA 2893-2, ETA 2824-2, ETA 2836-2, ETA 2892-A2, SW300-1 and SW220-1

  1. SW330-2 → ETA 2893-2

    Drop-in· not confirmed
    • =diameterETA 2893-2’s movement diameter matches SW330-2’s casing diameter: 25.6 mm.
    • =heightSame height: 4.1 mm.

  2. SW330-2 → ETA 2824-2

    Fits with changes· not confirmed
    • =diameterETA 2824-2’s movement diameter matches SW330-2’s casing diameter: 25.6 mm.
    • ≠heightETA 2824-2 is 0.5 mm taller (4.6 mm vs 4.1 mm): check the room under the crystal and the case back; the hands sit higher.

  3. SW330-2 → ETA 2836-2

    Fits with changes· not confirmed
    • =diameterETA 2836-2’s movement diameter matches SW330-2’s casing diameter: 25.6 mm.
    • ≠heightETA 2836-2 is 0.95 mm taller (5.05 mm vs 4.1 mm): check the room under the crystal and the case back; the hands sit higher.

  4. SW330-2 → ETA 2892-A2

    Fits with changes· not confirmed
    • =diameterETA 2892-A2’s movement diameter matches SW330-2’s casing diameter: 25.6 mm.
    • ≠heightETA 2892-A2 is 0.5 mm thinner (3.6 mm vs 4.1 mm): the dial and hands sit lower, so a spacer or a different stem height may be needed.

  5. SW330-2 → SW200-1

    Fits with changes· not confirmed
    • =diameterSame casing diameter: 25.6 mm.
    • ≠heightSW200-1 is 0.5 mm taller (4.6 mm vs 4.1 mm): check the room under the crystal and the case back; the hands sit higher.
    • ≠functionsSW200-1 has no 24-hour hand: the dial and hands of SW330-2 won’t match.

  6. SW330-2 → SW300-1

    Fits with changes· not confirmed
    • =diameterSame movement diameter: 26.2 mm.
    • ≠heightSW300-1 is 0.5 mm thinner (3.6 mm vs 4.1 mm): the dial and hands sit lower, so a spacer or a different stem height may be needed.
    • ≠functionsSW300-1 has no 24-hour hand: the dial and hands of SW330-2 won’t match.

  7. SW330-2 → SW220-1

    Fits with changes· not confirmed
    • =diameterSame casing diameter: 25.6 mm.
    • ≠heightSW220-1 is 0.95 mm taller (5.05 mm vs 4.1 mm): check the room under the crystal and the case back; the hands sit higher.
    • ≠functionsSW220-1 has no 24-hour hand: the dial and hands of SW330-2 won’t match.
    • ≠dateSW220-1 adds a day wheel: a date-only dial hides it, and the crown gets a day-setting step.

All SW330-2 figures

Every figure we hold for the SW330-2, with its source. Where sources disagree, each value is shown.

Size

Size in lignes
11½‴1
Diameter
26.2 mm1
Casing diameter
25.6 mm1
Height
4.1 mm1

Running

Jewels
251
Beat rate
28,800 bph1
Power reserve
56 h1
Hands and functions
hours, minutes, centre seconds, 24-hour hand, date1
Hacking seconds
Yes1
Hand winding
Yes1
Crown turns to full wind
711
Shock protection
Incabloc1

Accuracy and care

Accuracy (maker)
±5 s/day1
Positional difference
20 s/day1
Lift angle
51°1

Origin

Made in
SWISS MADE1

Not published yet

  • Hand holes: only in Sellita’s drawing; not read yet
  • Dial feet: only in Sellita’s drawing; not read yet
  • Stem part number: not in the documents we read
  • Do not set the date: not published by Sellita

SW330-2 questions

What is the lift angle of the SW330-2?

51°, as Sellita prints it. Enter 51° on a timegrapher to read amplitude correctly for the SW330-2.

Source [1]

How accurate is the SW330-2?

Sellita rates the SW330-2 at ±5 s/day, measured under Sellita’s own test conditions; a worn SW330-2 can run outside the ±5 s/day range.

Source [1]

How long does the SW330-2 run when fully wound?

About 56 h from a full wind, per Sellita; a full hand wind takes about 71 crown turns.

Source [1]

Does the SW330-2 hack and hand-wind?

Yes, it hacks: the seconds hand stops with the crown pulled out. It can be wound by the crown.

Source [1]

What can replace the SW330-2?

From the published figures, the closest is the ETA 2893-2: drop-in, not confirmed for every part. ETA 2893-2’s movement diameter matches SW330-2’s casing diameter: 25.6 mm.

More on movements

Sources

Documents checked · Report a wrong number

  1. 1SELLITA WATCH Co S.A. — Documentation technique SW330-2 (DocTec) · pdf · read