Longines Lindbergh Hour Angle

Reference number L2.678.4.11.x.
Caliber: Selfwinding mechanical movement L699 (ETA A07 111), 16 1/2 lines, 24 jewels, 28,800 vibrations per hour, power reserve of 42 hours.
Functions: Hours, minutes and seconds. Indication of longitude (in degrees and minutes of arc). Rotating center dial for synchronization of the seconds hand with a radio time signal. Rotating bezel to adjust to daily variations in the equation of time.
Case: Round, in polished stainless steel, 47.5 mm Ø. Hinged engraved back that opens to reveal a transparent sapphire protective plate.
Crown: “Louis XV” style.
Bezel: Brush-finished stainless steel engraved with blue and black Arabic numerals.
Dial: White lacquer. Black painted double minute track, 12 black painted Roman numerals. Degrees shown with blue painted Arabic numerals. Silvered rotating center dial. Black painted double minute track. Red and black painted Arabic numerals.
Hands: Blued steel, “Breguet” style.
Water resistance to 30 meters (~ 100 feet).
Crystal: Scratch-resistant sapphire.
Strap: Genuine brown leather, with “Charleston” clasp and extension.

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