Rolex OYSTER California Dial 1940s

VINTAGE ROLEX OYSTER California Dial 1940s

80 years of tropical patina.
Roman numerals Stick markers.
Gilt hands that aged to honey.

Rolex Reference 4220 is a highly collectible mid-sized vintage watch mostly associated with the Rolex Oyster Speedking and Oyster Royal lines produced from the 1940s through the 1950s. Known for its compact proportions and historic manual-wind mechanical reliability, this reference captures an authentic mid-century military and dress aesthetic

Key Specifications

Case Diameter: Approximately 29mm to 30mm (mid-sized/unisex by modern standards).

Lug-to-Lug: Around 35mm to 36mm.

Case Material: Dominated by Stainless Steel (though some gold-plated variations exist).

Movement: Manual-winding Calibre 10%" Hunter movement, often featuring Rolex's patented Superbalance system.

Crystal: Vintage domed Acrylic/Plastic crystal.

Crown: Screw-down "Rolex Oyster" or "Brevet" crown.

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Architectural & Design Dial Variants

Because Rolex utilized multiple dial manufacturers during this era, Ref. 4220 can be found with a wide variety of dial configurations:

• Standard Multi-Tone Dials: Often features a silver/ivory satin center with unique blued steel hands or a distinct red center-seconds hand. BB Black Bough I Sho... 1

Art Deco / Explorer Styles: Painted geometric, non-luminous numerals or standard mixed Roman and baton layouts.

California Dial: A rare and highly sought-after configuration featuring Roman numerals on the top half and Arabic numerals on the bottom half. Bob's Watches

Historic Context

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Introduced primarily during World War II, the Speedking series was designed as a durable

yet more accessible footprint within the Oyster lineup. It is famously tied to the historic

"POW program," where Rolex founder Hans Wilsdorf supplied watches to captured British

and Allied officers on credit, relying on their honor to pay after the war.

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