Lindberg & Sons Open-Heart Calendar Automatic Watch — Mechanical Wristwatch A sophisticated automatic wristwatch by Lindberg & Sons featuring a silver-white patterned dial, a visible open-heart balance wheel, full calendar complications, and a robust stainless steel case with a multi-link bracelet. Features: - Mechanical automatic movement - Silver-tone dial with textured guilloché pattern - Visible open-heart balance wheel mechanism at 6 o'clock with a decorative bridge - Big date double-window display below 12 o'clock - Sub-dial for day of the week at 9 o'clock - Sub-dial for month indication at 3 o'clock - Outer 24-hour scale ring (13 to 24) - Applied Roman numeral hour markers - Skeletonized main hands with luminous tips and a central seconds hand - Stainless steel case and multi-link stainless steel bracelet - Fluted main crown with protective shoulders, flanked by textured pusher buttons for calendar settings The watch is unused and unworn in excellent condition. Supplied in a original box with the original warranty card. The photographs show the actual item and are an integral part of the description.