The day difference time at Japan is less than +-1 minute / day. For practical, everyday use, it would be advisable to have the movement cleaned and oiled. For more information, please look at the pictures.Also, please confirm the item when you receive the item. For International Buyers - Please Note. And we do not investigate the state of the inside of the watch. We can not guarantee of features such as waterproof or accuracy. The item "Vintage 1966 JAPAN SEIKO SEIKOMATIC WEEKDATER 6206-8130 26Jewels Automatic" is in sale since Saturday, May 9, 2020. This item is in the category "Jewelry & Watches\Watches, Parts & Accessories\Watches\Wristwatches". The seller is "nonkun0508" and is located in Miyakonojo, Miyazaki. This item can be shipped worldwide.