This listing is for a vintage Seiko 100M stainless steel watch, serial #431500, 5Y89-0AL0. I put a new battery in it and it is running just fine. YOU MAY HAVE TO TIGHTEN THE BACK DOWN A BIT MORE TO MAKE IT WATER RESISTANT!! The band is in great shape and the clasp works just fine. I would consider it to be in very good used vintage condition. NO RESERVE. Buyer to prepay by PayPal. First Class Domestic s/h/Deliv Conf = $3.00. I ship 2-3 times a week, M-F...NO weekends. Thanks, Kathie