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The Encyclopedia of Horology

Wristwatch · Perpetual calendar wristwatch

A. Lange & Söhne Ref. 310.025 Langematik Perpetual

Partially verified

This A. Lange & Söhne Langematik Perpetual, reference 310.025, is a self-winding perpetual calendar wristwatch in a platinum case measuring 38.5 mm in diameter. According to the auction source, it is powered by the 43-jewel automatic calibre L922.1 featuring a zero-reset mechanism. The silver dial features applied Roman numerals, an oversized double date display beneath 12 o'clock, and three subsidiary dials indicating day with 24-hour display, month with leap year, and running seconds with moon phase. A rectangular pusher is situated on the case flank at 10 o'clock.

Dial and case front of the A. Lange & Söhne Langematik Perpetual ref. 310.025 in platinum
Dial and case front of the A. Lange & Söhne Langematik Perpetual ref. 310.025 in platinum — Phillips. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.phillips.com
Category
Wristwatch · Perpetual calendar wristwatch
Maker / attribution
A. Lange & Söhne
Reference
310.025
Catalogue / lot identifier
5
Source-reported date
Circa 2005
Source-reported place
Germany
Source-reported serial
152'254

Source-reported attribution and specifications are not independent authentication. A listing does not establish present ownership, current display, availability or permission to reproduce.

Object description

Case Construction and Exterior Hardware

The watch features a platinum case catalogued at 38.5 mm in diameter, fitted with straight lugs attached to an alligator strap. A prominent rectangular pusher is situated on the case flank at 10 o'clock, which auction cataloguing describes as typical of early Langematik Perpetual models prior to being replaced with a recessed corrector around 2005–2006.

The auction entry records that the case features three additional recessed calendar correctors and that the case, dial, movement, and buckle are signed by the manufacturer. Visible inspection from the available front photograph shows the rectangular flank pusher and straight lugs, whereas the case back, buckle, and additional recessed correctors are not depicted.

Evidence for this section
  • “Dimensions 38.5mm Diameter”
  • “Rectangular case pusher visible on the flank near 10 o'clock”
  • “Early Langematik Perpetual models like the present example, feature a rectangular case pusher at 10 o’clock, along with three recessed calendar correctors.”
  • “Signed Case, dial, movement and buckle signed”

Dial Layout and Complications

The light silver dial incorporates applied Roman numerals and faceted hour markers along with an extensive calendar and time display. Positioned directly beneath the 12 o'clock hour marker is an oversized double-aperture date window, identified in the catalogue as a signature brand characteristic.

The remaining indications are arranged across three subsidiary dials. These provide readings for the day of the week combined with a 24-hour indicator, the month combined with a leap year indicator, and running seconds integrated with a moon phase display.

Evidence for this section
  • “Light silver dial with applied Roman numerals and faceted hour markers”
  • “Double aperture oversized date display below 12 o'clock”
  • “Three subsidiary dials displaying day with 24-hour indicator, month with leap year, and moon phase with running seconds”
  • “The most noticeable feature of the model is the presence of the large date windows at 12 o 'clock, a “signature” characteristic of the brand.”

Reported Movement and Mechanism Details

The auctioneer catalogues the movement as the self-winding calibre L922.1 (movement number 36'868) with 43 jewels and an off-centred 21K gold rotor. It is described as incorporating a zero-reset mechanism that returns the running seconds hand to zero upon pulling the crown.

Because the case back and movement are not visible in the provided imagery, mechanical details such as the calibre layout, movement number, and functional zero-reset mechanism are cited solely from the auction house description.

Evidence for this section
  • “Movement No 36'868”
  • “Calibre Automatic, cal. 922.1, 43 jewels”
  • “featuring the manufacturer’s off-centred 21K gold rotor”
  • “the zero reset mechanism, meaning the seconds hand resets to zero when the crown is pulled.”

Open research questions

  • What specific individual case number and hallmarks are engraved on the exterior or interior of the platinum case back?
  • Can the undated International Guarantee stamped by Sincere Watch Ltd be cross-referenced with retailer sales archives to establish the original point of sale date?
  • Does direct physical inspection confirm the operational resetting of the seconds hand and proper cycling of the perpetual calendar correctors?

Source evidence

Recorded claims and source quotations for A. Lange & Söhne Ref. 310.025 Langematik Perpetual
FieldSource-reported valueSource quotation
Reference Number310.025“Reference No 310.025”
Case Number152'254“Case No 152'254”
Movement Number36'868“Movement No 36'868”
CalibreAutomatic, cal. 922.1, 43 jewels“Calibre Automatic, cal. 922.1, 43 jewels”
Case MaterialPlatinum“Material Platinum”
Dimensions38.5mm Diameter“Dimensions 38.5mm Diameter”
Retailer StampSincere Watch Ltd“Accompanied by A. Lange & Söhne undated International Guarantee stamped by Sincere Watch Ltd”
Buckle TypePlatinum pin buckle“Clasp/Buckle Platinum A. Lange & Söhne pin buckle”

Visible details

  • Light silver dial with applied Roman numerals and faceted hour markers
  • Double aperture oversized date display below 12 o'clock
  • Three subsidiary dials displaying day with 24-hour indicator, month with leap year, and moon phase with running seconds
  • Dark blue alligator leather strap fitted to straight platinum lugs
  • Rectangular case pusher visible on the flank near 10 o'clock

Research qualifications

  • Case back, movement, and platinum pin buckle are not visible in the provided photograph.
  • Accessories, presentation boxes, and guarantee booklet described by the auctioneer are not depicted.

Photograph identity and source facts were screened before import; rights clearance remains pending.

Consulted source

A. Lange & Söhne Phillips Watches Online Auction: The Geneva Sessions Fall 2023

Reviewed 2026-10-21 · Record b4c17c6b76

Terms in this record

Glossary explanations for terms named in this object’s record.

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