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Top-tier supplier movement · caliber Alpina Cal. AL-525: ETA 2892-A2 base, Alpina-finished, 28,800bph, 38h PR, 21j; used in Alpiner 4 and Seastrong Diver; Alpina sport watch workhorse · 38h power reserve
Medium-large: suits wrists 6.5 in+ (16.5 cm+)
40 mm case. Wears confidently on average to larger wrists. May overhang on slender builds.

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Authentication

The mountain silhouette at 6 o'clock is the Alpiner 4 identity marker; the AL-525 is ETA 2892-based and this is visible and verifiable through the caseback.

Known issues in the market
  • The ETA 2892 architecture is common and well-documented; any Alpiner 4 with a different movement layout has a service replacement with a non-genuine caliber.
AreaWhat to checkWhat is correctRed flag
dialMountain silhouette at 6 o'clockMountain silhouette logo present at 6 o'clock on most Alpiner 4 dial variantsMissing mountain silhouette; wrong reference or non-genuine dial
movementETA 2892-A2 movement architectureETA 2892-A2 movement layout visible through caseback; Alpina-finished rotorNon-ETA-2892 movement architecture; non-genuine movement swap
casebackAlpina signed casebackAlpina signed caseback with correct reference numberGeneric caseback or non-matching reference number
Common legitimate replacements
  • Crystal; sapphire standard.
  • Crown; Alpina-signed.
Expert resources: Alpina authorized service; Alpina Alpiner 4 product documentation.

Authentication guide

Last reviewed June 2026

The Alpiner 4 is built around the AL-525 movement and the four-pillar specification: anti-magnetic, water-resistant, anti-shock, anti-reflective. All four pillars are printed on the caseback.

Known reproduction risks

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LOW

Alpina is not a significant counterfeit target.

  • Red alpine triangle on replicas is often the wrong shade or slightly off-centre; genuine is bright red and precisely placed
  • Sector dial texture on replicas is flat-printed; genuine has depth from the multiple applied zones

Dial variants by era

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EraDescriptionIdentifiers
2012 to present44mm steel case. Sporty three-hand layout with date. Sector dial with applied markers. "Alpiner 4" text at 6 o'clock. Red alpine triangle at 12.
  • Red alpine triangle at 12 o'clock is Alpina's house signature; absence is wrong
  • "ALPINER 4" in all-caps on dial below centre
  • Sector dial pattern (multiple concentric zones) distinguishes the Alpiner 4 from the plainer Alpiner 3
2018 to present (Big Date variant)Same base case with a big-date complication at 12 o'clock using AL-650 movement.
  • Big date uses two overlapping apertures; standard date is a single window at 3
  • Movement designation "AL-650" on caseback for big-date variant vs "AL-525" for standard

Service part flags

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Crown

Original: Screw-down crown with Alpina logo (stylised A).

Replacement tells
  • Unsigned or generic crown is an aftermarket substitute
  • Crown that will not screw down fully suggests stripped case tube
Caseback

Original: Screwback with the four-pillar specification text and Alpina logo.

Replacement tells
  • Plain caseback without four-pillar text means a replacement caseback from a different model or an aftermarket part

Case back markings

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2012 to present
  • "ALPINA GENEVE" and "ALPINER 4"
  • "AL-525" movement designation (or AL-650 for big-date)
  • Four pillar text: "Anti-Magnetic", "Water Resistant", "Anti-Shock", "Anti-Reflective"
  • "Swiss Made", water resistance rating (typically 100M)
  • Serial number and reference number

Movement tells

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  • AL-525 is a 25-jewel automatic with a bidirectional winding rotor; Alpina sources the base from a Swiss ébauche supplier and decorates it in-house.
  • Power reserve is approximately 38 hours; below 30 hours when fully wound indicates worn mainspring.
  • The movement has an anti-magnetic inner cage; if a magnet is held near the running watch, the rate should not change significantly. Significant rate change suggests the cage was removed or damaged during service.
  • Hack seconds (stop function) should be crisp; the second hand should stop immediately when the crown is pulled to the time-setting position.
Sources: Alpina Alpiner 4 product page.

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