勞力士，不銹鋼腕錶，配寛錶圈，”Lifesaver”，型號2849，約1940年製

Advertised as "Oyster de Luxe", reference 2849 is sometimes collectively known as "Lifesaver" for its close resemblance to the lifebelts found in the nautical world.

At the time the model went into production, men's watches were becoming larger, and the concept behind the design of the "Lifesaver" was an attempt by Rolex to emphasize the smallness of the watches rather than hide it, with wide bezel and a tiny dial. The model is also the first exaggerated style Rolex "Oyster".