Jaeger DuoPlan Tank Back Winder 18k Yellow Gold from 1940s

Jaeger-LeCoultre DuoPlan “Tank” – 18K Yellow Gold
Circa 1930s–1940s

A remarkable and highly distinctive creation from Jaeger-LeCoultre’s early technical golden age, this Jaeger DuoPlan Tank is a fascinating blend of innovative movement architecture and refined Art Deco design. Crafted in 18K yellow gold and produced during the late 1930s to 1940s, this watch stands out not only for its elegant Tank-style case, but also for its exceptionally rare and ingenious DuoPlan movement.

Large, architectural, and technically daring for its time, this is a true connoisseur’s vintage Jaeger.

The Case – Art Deco Proportions, Unusually Large for the Era

The 18K yellow gold case measures 22 × 35 mm, making it notably large for a watch of this period—particularly for the 1930s and 1940s, when most rectangular watches were significantly smaller. The elongated Tank-style silhouette gives the watch strong wrist presence while remaining elegant and balanced.

The case is fitted with its original gold crown, a highly desirable detail that reinforces the watch’s originality. The overall design is pure Art Deco, with clean lines and refined proportions that reflect the aesthetic sensibilities of the era.

A mineral glass crystal protects the dial, remaining faithful to the watch’s vintage character.

The Dial – Classic Elegance

The watch features a white dial, most likely restored at some point in its life—mentioned with full transparency. The restoration has been executed in a tasteful and period-correct manner, preserving the watch’s vintage charm and legibility.

Complementing the dial are beautiful blue steel hands, adding contrast and a touch of color that enhances the overall elegance of the piece.

The Movement – The Legendary DuoPlan

At the heart of this watch is the famed Jaeger-LeCoultre DuoPlan movement, one of the most interesting and technically inventive calibres of its time. Wound from the back, the DuoPlan features a two-level construction, stacking components vertically rather than spreading them horizontally.

This ingenious architecture allowed Jaeger-LeCoultre to create slim yet mechanically robust movements, and it is precisely this dual-layer design that gives the movement its name: DuoPlan, meaning “two levels.”

Highly complex and far less common than traditional calibres, DuoPlan movements are increasingly rare today and highly sought after by collectors who appreciate early horological innovation.

Strap – Handcrafted Refinement

The watch is fitted with a handmade leather strap from Belgium, offering comfort and a refined finishing touch that complements the watch’s vintage aesthetic.

Key Details

• Model: Jaeger-LeCoultre DuoPlan Tank

• Era: Circa 1930s–1940s

• Case Material: 18K Yellow Gold

• Case Size: 22 × 35 mm

• Dial: White (likely restored)

• Hands: Blue Steel

• Crystal: Mineral Glass

• Crown: Original Gold Crown

• Movement: Jaeger-LeCoultre DuoPlan, Manual Wind (Back Winder)

• Strap: Handmade Leather Strap (Belgium)

• Condition: Excellent vintage presence, honest and well preserved

Why This Watch?

This Jaeger DuoPlan Tank is special on multiple levels: a rare and technically fascinating movement, an unusually large case for its era, and the timeless elegance of Art Deco design in solid gold.

The DuoPlan calibre alone makes this watch a standout, representing Jaeger-LeCoultre’s pioneering spirit and mechanical ingenuity during the early 20th century. Combined with its strong proportions and refined aesthetics, this is a stunning and rare vintage Jaeger, perfectly suited for collectors seeking something truly distinctive and historically significant.