V2 A. Lange & Söhne 1815 Tourbillon 42mm
The V2 A. Lange & Söhne 1815 Tourbillon is a 42mm manually wound mechanical watch built around a functional tourbillon mechanism and a movement configured with Cal. L02.1-style architecture and finishing.
The watch measures 42mm in diameter and 12mm in thickness and is paired with a calfskin leather strap.
Unlike conventional three-hand mechanical watches, the tourbillon mechanism is a central visual and mechanical element of this version, allowing the rotating regulating assembly to remain visible from the dial side.
42mm Case
The V2 version measures:
Diameter: 42mm
Thickness: 12mm
The 42mm diameter provides sufficient dial space for the exposed tourbillon while maintaining separation between the main time display and the rotating mechanical assembly.
At 12mm thick, the case accommodates the manually wound movement and tourbillon construction without requiring an excessively deep case profile.
Functional Tourbillon Mechanism
The defining mechanical feature of this version is its functional tourbillon.
Instead of keeping the regulating components stationary within the movement, the tourbillon places the regulating assembly inside a rotating cage.
As the mechanism operates, the cage rotates continuously, making the movement of the escapement and regulating components visible from the dial side.
This is a functional mechanical structure rather than a decorative rotating component.
Cal. L02.1-Style Movement
The V2 version uses a manually wound mechanical movement configured around the appearance and architecture of the A. Lange & Söhne Cal. L02.1.
For technical accuracy, this movement should be distinguished from a genuine manufacture-produced Lange Cal. L02.1.
The V2 movement is therefore best described as an L02.1-style manual tourbillon movement.
This distinction provides a clearer description of the actual movement configuration while still identifying the movement architecture that the V2 version is designed around.
Manual Winding
The movement uses a manual-winding system rather than an automatic rotor.
Energy is supplied by turning the crown to wind the mainspring.
This configuration also means that an automatic winding rotor is not required, leaving the movement architecture focused on the manual winding train and tourbillon mechanism.
Central Tourbillon Presentation
The tourbillon is positioned as a major visual element of the dial.
Its rotating cage provides continuous mechanical movement while the surrounding dial remains comparatively restrained.
This contrast between a traditional dial layout and the exposed tourbillon is one of the defining characteristics of the 1815 Tourbillon design.
Calfskin Leather Strap
The supplied V2 configuration is fitted with a calfskin leather strap.
The leather strap complements the traditional design of the 1815 collection and provides a softer wearing profile compared with a metal bracelet.
Because natural leather is sensitive to moisture, prolonged exposure to water should be avoided.
Technical Specifications
Specification Details
Version V2
Brand A. Lange & Söhne
Collection 1815 Tourbillon
Case Diameter 42mm
Case Thickness 12mm
Movement Cal. L02.1-Style Tourbillon
Movement Type Manual Winding Mechanical
Tourbillon Functional
Winding Manual
Strap Calfskin Leather
V2 Version Characteristics
The main identifiers of this V2 configuration are its 42mm case, 12mm thickness, functional tourbillon, manually wound movement, L02.1-style movement architecture, and calfskin leather strap.
These specifications are more useful for identifying and comparing the V2 version than broad claims about quality or similarity.
In particular, the movement description is important when comparing different 1815 Tourbillon versions because an L02.1-style movement configuration and a genuine Lange manufacture Cal. L02.1 should not be treated as the same movement.
Tourbillon vs. Conventional Mechanical Movement
The primary mechanical difference is the construction of the regulating system.
In a conventional mechanical movement, the escapement and regulating components operate from a fixed position.
In this tourbillon configuration, the regulating assembly is housed within a rotating cage, making its mechanical operation one of the most visually prominent elements of the watch.
This is also why the movement itself is a more important part of the 1815 Tourbillon’s identity than it would be on a conventional time-only watch.
Wearing and Care
At 42 × 12mm, this version has a substantial diameter while maintaining a relatively moderate case thickness for its mechanical configuration.
The movement requires manual winding, so the crown should be wound gradually and without excessive force. Once noticeable resistance increases near the end of the winding process, avoid forcing the crown further.
Because the tourbillon contains small moving components, strong impacts should be avoided.
The calfskin leather strap should also be protected from prolonged contact with water and excessive moisture.
Frequently Asked Questions
What is the size of the V2 1815 Tourbillon?
The watch measures 42mm in diameter and 12mm in thickness.
What type of movement does this version use?
It uses a manually wound mechanical tourbillon movement with an L02.1-style configuration.
Is the tourbillon functional?
Yes. The supplied V2 specification identifies this version as using a functional mechanical tourbillon.
Is the movement a genuine A. Lange & Söhne Cal. L02.1?
No. The movement should be described as an L02.1-style configuration rather than a genuine A. Lange & Söhne manufacture Cal. L02.1.
Is this an automatic movement?
No. This version uses a manual-winding mechanical movement.
How is the movement wound?
The mainspring is wound manually through the crown.
What type of strap does this version use?
The supplied configuration uses a calfskin leather strap.
What are the main characteristics of the V2 version?
Its principal supplied specifications are the 42mm diameter, 12mm thickness, functional tourbillon, manual-winding L02.1-style movement, and calfskin leather strap.
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