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Movement · Sellita · automatic

Sellita SW300-1 movement

Sellita SW300-1 is an automatic movement by Sellita: 26.2 mm1 across, 3.6 mm1 high, 251 jewels, beating at 28,800 bph1, 56 h1 of power reserve.

Sources checked · How we source numbers
Sellita SW300-1: movement drawingSellita SW300-1, dial side, to scale: movement diameter 26.2 mm; casing diameter 25.6 mm; size 11½‴; height 3.6 mm; hour, minute, second hand hole Ø — (unknown).movement Ø 26.2casing Ø 25.611½‴ as printed · Ø 26.2 = 11.61‴3.6SIDE · SECTION · height 3.6Ahour, minute, second hand hole Ø —DETAIL A · 10:1
Sellita SW300-1, dial sideDrawing from data, not a photo · mm

SW300-1 at a glance

Diameter
26.2 mm1
Height
3.6 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 SW300-1

The figures a watchmaker or a timegrapher needs for the SW300-1, 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 SW300-1

The figures a dial, hands or case must match for the SW300-1, as Sellita prints them.

Casing diameter
25.6 mm1

Same family at Sellita

How each differs from the SW300-1, worked out from the figures on its own page.

What can replace the SW300-1

7 calibres of the ETA 28xx and Sellita SW200 / SW300 group checked against the SW300-1: diameter, height, hand holes, date window, crown and dial feet. A verdict marked “not confirmed” lacks one of those figures for the SW300-1 or the other calibre.

Not published, so not checked in several comparisons:

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

  1. SW300-1 → ETA 2892-A2

    Drop-in· not confirmed
    • =diameterETA 2892-A2’s movement diameter matches SW300-1’s casing diameter: 25.6 mm.
    • =heightSame height: 3.6 mm.

  2. SW300-1 → ETA 2824-2

    Fits with changes· not confirmed
    • =diameterETA 2824-2’s movement diameter matches SW300-1’s casing diameter: 25.6 mm.
    • ≠heightETA 2824-2 is 1 mm taller (4.6 mm vs 3.6 mm): check the room under the crystal and the case back; the hands sit higher.

  3. SW300-1 → ETA 2836-2

    Fits with changes· not confirmed
    • =diameterETA 2836-2’s movement diameter matches SW300-1’s casing diameter: 25.6 mm.
    • ≠heightETA 2836-2 is 1.45 mm taller (5.05 mm vs 3.6 mm): check the room under the crystal and the case back; the hands sit higher.

  4. SW300-1 → SW200-1

    Fits with changes· not confirmed
    • =diameterSame casing diameter: 25.6 mm.
    • ≠heightSW200-1 is 1 mm taller (4.6 mm vs 3.6 mm): check the room under the crystal and the case back; the hands sit higher.

  5. SW300-1 → ETA 2893-2

    Fits with changes· not confirmed
    • =diameterETA 2893-2’s movement diameter matches SW300-1’s casing diameter: 25.6 mm.
    • ≠heightETA 2893-2 is 0.5 mm taller (4.1 mm vs 3.6 mm): check the room under the crystal and the case back; the hands sit higher.
    • ≠functionsETA 2893-2 adds a 24-hour hand: it needs a dial and hand set made for it.

  6. SW300-1 → SW220-1

    Fits with changes· not confirmed
    • =diameterSame casing diameter: 25.6 mm.
    • ≠heightSW220-1 is 1.45 mm taller (5.05 mm vs 3.6 mm): check the room under the crystal and the case back; the hands sit higher.
    • ≠dateSW220-1 adds a day wheel: a date-only dial hides it, and the crown gets a day-setting step.

  7. SW300-1 → SW330-2

    Fits with changes· not confirmed
    • =diameterSame movement diameter: 26.2 mm.
    • ≠heightSW330-2 is 0.5 mm taller (4.1 mm vs 3.6 mm): check the room under the crystal and the case back; the hands sit higher.
    • ≠functionsSW330-2 adds a 24-hour hand: it needs a dial and hand set made for it.

All SW300-1 figures

Every figure we hold for the SW300-1, 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
3.6 mm1

Running

Jewels
251
Beat rate
28,800 bph1
Power reserve
56 h1
Hands and functions
hours, minutes, centre seconds, 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

SW300-1 questions

What is the lift angle of the SW300-1?

51°, as Sellita prints it. Enter 51° on a timegrapher to read amplitude correctly for the SW300-1.

Source [1]

How accurate is the SW300-1?

Sellita rates the SW300-1 at ±5 s/day, measured under Sellita’s own test conditions; a worn SW300-1 can run outside the ±5 s/day range.

Source [1]

How long does the SW300-1 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 SW300-1 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 SW300-1?

From the published figures, the closest is the ETA 2892-A2: drop-in, not confirmed for every part. ETA 2892-A2’s movement diameter matches SW300-1’s casing diameter: 25.6 mm.

More on movements

Sources

Documents checked · Report a wrong number

  1. 1SELLITA WATCH Co S.A. — Documentation technique SW300-1 (DocTec) · pdf · read