Tank Must watch, extra-large model, mechanical movement with automatic winding, calibre 1847 MC. Steel case, beaded crown set with a synthetic cabochon-shaped spinel, silvered flinqué dial, blued-steel sword-shaped hands, black grained calfskin strap, interchangeable steel folding buckle, calendar aperture at 6 o'clock. Case dimensions: 41 mm x 31 mm, thickness: 8.4 mm. Water-resistant to 3 bar (approx. 30 metres).