The Vintage Seth Thomas US Navy Nautical 24 Hour Ship Clock is a collectible piece that once served as a critical tool on naval ships. The clock will run forever but it does loose time. So not accurate. The key is with the clock. Made by renowned clockmaker Seth Thomas, this clock is a representation of maritime history and its use in the US Navy. With a traditional design and markings specific to naval timekeeping, this clock is a unique and sought-after item for those interested in antiques and maritime memorabilia. The inclusion of the key adds to the authenticity and functionality of this piece, making it a valuable addition to any collection. Clock has been professionally cleaned & keeps great time.