Rolex Oyster Perpetual ‘Bubble Back’ 2940 with Leaf Hands circa 1946

The Rolex ‘Bubble Back’ stands as one of the most important early automatic wristwatches in the brand’s storied history. Introduced in the 1930s, these watches helped establish Rolex’s reputation for durable, water-resistant, self-winding timepieces—a legacy that would lead to the development of the modern Oyster Perpetual line.

This particular example, the Ref. 2940, dates to circa 1946 and features a 32 mm stainless steel case with the distinctive rounded, protruding caseback that gives the model its nickname. The white dial is clean and timeless, set with applied hour markers that reflect the design language of the period. Inside beats the early Rolex automatic movement, the technological centerpiece of the Bubble Back series.

Freshly serviced in June 2025, this watch remains in excellent running condition and comes with its original Rolex buckle, a rare and desirable detail for collectors.

Highlights

• Original Rolex buckle included
• Freshly serviced (June 2025) and running perfectly
• Attractive and well-preserved white dial with applied markers

Specifications

Brand: Rolex
Model: Oyster Perpetual ‘Bubble Back’
Reference: 2940
Case Material: Stainless steel
Dial: White
Markers: Applied markers
Movement: Rolex automatic
Case Width (excl. crown): 32 x 40 mm
Year: Circa 1946

Condition: Freshly serviced (June 2025), excellent overall condition

An exceptional example of Rolex’s pioneering automatic wristwatches, this Bubble Back Ref. 2940 offers both historical significance and charming vintage appeal—enhanced by its originality and fresh service.