A. Lange & Söhne Ref. 310.025 Langematik Perpetual

Technical characteristics

Type

Perpetual calendar wristwatch

Calibre

Automatic, cal. 922.1, 43 jewels

Dimensions

38.5mm Diameter

Case Number

152'254

Case Material

Platinum

Place recorded

Germany

Movement Number

36'868

Reference Number

310.025

Maker / attribution

A. Lange & Söhne

Design

Visible features

• 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

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.

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.

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.

Identification

Reference

310.025

Serial number

152'254

Source note

Facts transcribed from the linked source listing or collection record. Attribution and specifications are source-reported and have not been independently authenticated.

Catalogue references

No catalogue numbers recorded. Numbers are only published once transcribed from a verified edition of a standard catalogue — they are never inferred.