This is a vintage Seiko Precision 21 Jewels Second Setting pocket watch, reference 6110-0010T, a Japanese-made mechanical pocket watch with strong railway-watch character. Seiko has a long and important history with Japanese railway timekeeping. In 1929, as Japan’s railway network expanded, Seiko pocket watches were appointed as official railway watches for Japan National Railways. These watches were made for professional use, where accurate and reliable timekeeping was essential for train operation and railway staff. This example belongs to that respected Seiko Precision pocket watch tradition. The dial is marked: SEIKO PRECISION 21 JEWELS SECOND SETTING JAPAN 6110-0010T The “Second Setting” marking is one of the most important features of this watch. This refers to a hacking / seconds-setting function. When the crown is pulled, the seconds hand stops, allowing the time to be set precisely against a reference signal. This function was especially important for railway and professional timing use, where even small differences in time could matter. The watch has a clean and highly legible white dial with large Arabic numerals. The bold printed numerals, clear minute track and dark hands create excellent visibility. This practical dial design is exactly the kind of functional beauty that makes Japanese railway-style pocket watches so appealing. The case is large and impressive, measuring approximately 50.4 mm across, excluding the crown. Including the bow, the total height is approximately 72.0 mm. The thickness is approximately 14.7 mm. The watch weighs approximately 82.1 g. It has a strong, solid presence in the hand and works very well both as a collectible pocket watch and as a display piece. The chrome-toned case has a clean, rounded form with a polished finish. There are some scratches, scuffs and age-related marks on the case and back, but overall the watch remains in very attractive vintage condition. The white dial is especially clean and gives the watch a sharp, professional appearance. The bow / ring at the top is included, as shown in the photos. Please note that the ring shows age-related wear, discoloration and marks. Please check the photos carefully for its condition. The case back has not been opened, so no movement photos are included. The movement has not been visually inspected. However, the watch is currently running, and the hacking / Second Setting function has been checked and is working. Measurements and details: Brand: Seiko Model: Precision Second Setting Reference: 6110-0010T Type: pocket watch Movement: mechanical hand-winding Jewels: 21 jewels Dial marking: SEIKO PRECISION / 21 JEWELS / SECOND SETTING Dial: white dial with large Arabic numerals Case style: open-face pocket watch Case diameter: approximately 50.4 mm, excluding crown Total height: approximately 72.0 mm, including bow Thickness: approximately 14.7 mm Weight: approximately 82.1 g Function: hours, minutes, central seconds Special function: Second Setting / hacking seconds function Box and papers: not included Condition-wise, this is a vintage pre-owned pocket watch. There are scratches, scuffs, small marks and signs of age on the case, case back, bow / ring and crystal. The case back has visible surface scratches from age and handling. The bow / ring also shows wear and discoloration. Please check all photos carefully, as they form an important part of the description. The dial is very attractive overall, with strong legibility and a clean Seiko Precision appearance. The large Arabic numerals and simple railway-style layout give the watch a highly practical and classic look. The watch is currently running. The Second Setting / hacking function has been checked. However, the service history is unknown. Accuracy, power reserve and long-term operation have not been tested and are not guaranteed. This is a vintage mechanical pocket watch, and future maintenance or servicing may be required. This is a very attractive Seiko Precision 21 Jewels Second Setting pocket watch, with a large 50 mm class case, clean white dial, strong railway-watch character and working seconds-setting function. It is an excellent piece for collectors of vintage Seiko, Japanese railway watches, mechanical pocket watches and professional timekeeping instruments. The watch will be carefully packed and shipped with tracking.