Yellow gold (750) gousset watch, the reverse adorned with radiating guilloches, with a small blank oval cartouche. White enameled dial with Arabic numerals and railway markings. Metal dust cover, possibly attached. Rooster movement. Sphinx" title mark on the right, facing left within an irregular octagonal frame, the number 3 on the left for gold 3rd title (750/1000) for departments between 1819 and 1838. Gold "masque bachique" guarantee hallmark for heavy work, turned right in a round frame, on either side a number (probably 23) indicating the guarantee office for departments between 1819 and 1838. Probably Montbéliard, 1819-1838. Diameter: 56 mm. Gross weight: 121.5 g. Minor wear, missing glass and key. With its veneered wood display stand with fillet inlay.