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Movement comparison

NH35 vs ETA 2824-2

1.8 mm narrower; 0.72 mm thinner. Can ETA 2824-2 replace NH35? Only with changes to the watch or parts. Some fit figures are still unpublished, so this verdict is not confirmed.

Sources checked · How we source numbers
Movements to scale: TMI NH35, ETA 2824-2Dial side and side section at one scale, hand holes enlarged 8:1. A TMI NH35: Ø 27.4, H 5.32, date 3H, crown 3H. B ETA 2824-2: Ø 25.6, H 4.6, date —, crown — (vs A: Ø −1.8 H −0.72 mm).B Ø 25.6A Ø 27.4B 4.6A 5.32SIDE · HEIGHTS ON ONE BASELINEHAND HOLES · 8:1A hour 1.5 · minute 0.88 · second 0.198B hand holes —A TMI NH35Ø 27.4 · H 5.32 · date 3H · crown 3HB ETA 2824-2Ø 25.6 · H 4.6 · date — · crown —vs A: Ø −1.8 H −0.72 mm
NH35 vs ETA 2824-2 to one scaleDrawing from data, not a photo · mm

Published figures

Differences are highlighted. Each number links to its source; an empty field says what is missing.

NH35 vs ETA 2824-2 specification comparison
FigureATMI NH35BETA 2824-2
Diameterdiffers27.4 mm125.6 mm2
Casing diameterone side only29.36 mm1not published
Size in lignesdiffers12‴311½‴2
Heightdiffers5.32 mm14.6 mm2
Jewelsdiffers243252
Beat ratediffers21,600 bph328,800 bph2
Power reservediffers41 h442 h2
Accuracy (maker)one side only−20 to +40 s/day4not published by ETA
Lift anglediffers53°450°2
Hands and functionsone side onlyhours, minutes, centre seconds, date3not published by ETA
Hacking secondsone side onlyYes3not published by ETA
Hand windingone side onlyYes4not published by ETA
Date windowone side only3H4 · 3H, 6H, 9H5not published by ETA
Do not set the dateone side only21:00–04:006not published by ETA
Crownone side only3H4 · 4H7not published by ETA
Hand holesone side onlyhour 1.5 · minute 0.88 · second 0.198 mm5not shown: ETA keeps its drawings confidential
Dial feetone side only1:36, 7:335 · 1:36, 7:335not shown: ETA keeps its drawings confidential
Dial centre holeone side only2.05 mm5not shown: ETA keeps its drawings confidential

Can ETA 2824-2 replace NH35?

The direction matters: this checks a watch built for the first calibre with the second installed. Size alone does not prove that hands, dial, stem and case will fit.

Fits with changes· not confirmed
  • ≠diameterETA 2824-2 is 1.8 mm narrower (movement diameter 25.6 mm vs 27.4 mm): it needs a movement ring or holder to sit centred.
  • ≠heightETA 2824-2 is 0.72 mm thinner (4.6 mm vs 5.32 mm): the dial and hands sit lower, so a spacer or a different stem height may be needed.

Not published, so not checked: hand holes for ETA 2824-2; crown position for ETA 2824-2; dial feet for ETA 2824-2.

Check the actual case, stem height and parts before ordering. Compare another pair.

Sources

Documents checked · Report a wrong number

  1. 1Time Module Ltd. — Watch Movement Specification and Drawing - Standard Mechanical Movement NH35A · pdf · read
  2. 2ETA SA Manufacture Horlogère Suisse — Technical Communication CT 2824-2 (11 ½''' ETA 2824-2) · pdf · read
  3. 3Time Module Ltd. — Product Line-Up - Mechanical (NH0&NH3); NH34/NH35/NH36 product blocks · html · read
  4. 4Time Module Ltd. — Technical Guide & Parts Catalogue, Cal.NH3 Series (NH34A/35A/36A/37A/38A/39A) - Automatic Mechanical · pdf · read
  5. 5Time Module Ltd. — Watch Movement Specification and Drawing - NH35A (drawing pages read: Appearance-1, Hand Fitting, Hand Setting Stem, Dial-1, Dial-2, Hands) · pdf · read
  6. 6Time Module Ltd. — Operation Manual, Cal.NH3 Series (NH34A/35A/36A/37A/38A/39A) · pdf · read
  7. 7Lucius Atelier (seller) — Seiko Mod Dial Compatibility Guide: NH34, NH35, NH36 (blog article) · html · read