California dial

The use of this style dates back to the 1930s, and was featured in early Rolex and Panerai watches.

[1] Originally called the “high visibility” or “error proof” dial, it was created during World War II to aid legibility in low-light combat conditions.

[2] After the war, the style faded away until it was popularized in the 1980s economic boom in Japan.

[8] Their series II edition was inspired by geographical landmarks in Northern California.

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A California dial Panerai
Apple Watch Series 4 with California dial