Overview This is a Longines open-face mechanical pocket watch with a very classic early Swiss pocket watch character. The white dial features black Arabic numerals, red 13 to 24 hour numerals, and subsidiary seconds at 6 o’clock, giving the dial more visual interest than a standard single-scale layout. The case back is decorated with fine guilloché work and a central shield-shaped floral cartouche, while the inner dust cover is engraved with Longines, 10 Grands Prix and multiple medal motifs. The most notable highlights of this watch are the Longines brand, the 0.800 silver case, the red 24-hour auxiliary scale and the medal-decorated inner dust cover. Technical and condition details Type: Open-face mechanical pocket watch Winding: Manual winding Function: Running when tested. No long-term accuracy test has been performed. Dial layout: Central hour and minute hands, subsidiary seconds at 6 o’clock, outer minute track, and red 13 to 24 hour auxiliary scale Dial: White dial with black Arabic numerals, red 24-hour numerals, signed Longines. The layout is clear, balanced and strongly classical in appearance. Case: 0.800 silver open-face case. The back cover has fine guilloché decoration with a central shield-shaped floral cartouche. The inner dust cover is marked EFCo Longines, 0.800, serial number 5063354, and decorated with Longines 10 Grands Prix medal motifs. Movement: Signed Longines mechanical movement with gilt plates, traditional regulator, ruby jewels and movement number 5063354. The movement appears complete and orderly. Diameter: Approx. 50.51 mm Weight: Approx. 82.37 g Condition: Overall in honest antique condition with age-related wear. The case shows scratches, oxidation, edge wear and local surface wear, with visible signs of age around the outer rim. The guilloché decoration on the back remains clear, and the central shield-shaped cartouche is still attractive. The dial is generally clear, with legible numerals, scales and Longines signature, showing minor aging and small marks. The inner dust cover shows normal scratches and use marks, while the medal motifs and inscriptions remain decorative. The movement is running when tested, but no long-term test has been performed. It should be assessed as an antique pocket watch. Collector’s highlights Longines mechanical pocket watch with strong brand appeal 0.800 silver case with clear silver marking and serial number White Arabic numeral dial with red 13 to 24 hour auxiliary scale Classic subsidiary seconds layout at 6 o’clock Inner dust cover decorated with 10 Grands Prix and medal motifs Guilloché case back with central shield-shaped floral cartouche, giving strong display appeal Photos form an important part of the description and may show details more clearly than text. Please review all images carefully and assess the item accordingly.