Reference:1665: Difference between revisions
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===Double Red Sea-Dweller, Mk I (Patent Pending)=== | ===Double Red Sea-Dweller, Mk I (Patent Pending)=== | ||
[[File:Ref 1665 patent-pending-caseback.webp|thumb|right|320px|alt=Patent Pending caseback — hand-engraved "OYSTER GAS ESCAPE VALVE / PATENT PENDING" in parentheses-style layout. Image via Monochrome.|Patent Pending caseback — hand-engraved "OYSTER GAS ESCAPE VALVE / PATENT PENDING" in parentheses-style layout. Image via Monochrome.]] | |||
The Mk I lives inside two serial clusters — the 1.7M range and the 2.1M to 2.2M range. The latter includes the Patent Pending production proper. The caseback engraving is hand-cut, reading "OYSTER GAS ESCAPE VALVE / PATENT PENDING" in parentheses-style layout. The dial is Beyeler. | The Mk I lives inside two serial clusters — the 1.7M range and the 2.1M to 2.2M range. The latter includes the Patent Pending production proper. The caseback engraving is hand-cut, reading "OYSTER GAS ESCAPE VALVE / PATENT PENDING" in parentheses-style layout. The dial is Beyeler. | ||