This is a 4R36-14B0 5 Sports Diver automatic watch with a see-through back, released by Seiko. The calendar can be adjusted by pulling the crown out one step. The day display is in English and Japanese. The crown is not a screw-down type. It is equipped with a unidirectional rotating bezel, making it a model with a substantial feel. The bezel has a clicking feel. Size: 37mm wide x 41mm long (lug to lug), Thickness: 12mm (width does not include crown guards) The band is a Seiko stainless steel band. Wrist size: Maximum approx. 15cm, lug width 20mm The current daily rate is operating at approximately ±1 minute when laid flat. The accuracy is generally as described, but since the overhaul history is unknown, please consider this as a guideline. Also, as it is an old item, there may be accuracy errors depending on the environment, position, and temperature after purchase. Regarding the accuracy after arrival, please accept an error of ±5 minutes as an acceptable range. Please consider this purchase as being based on the premise of maintenance. Regarding the condition, there may be omissions in the description, so please comment if there are any areas of concern. Appearance: Overall, I think it is in good condition. Water resistance is not guaranteed as a water resistance test has not been performed. Regarding the shipping of watches and small items: Shipping costs will be covered by us only for shipping via Yamato's Nekopos. However, we are not responsible for the loss of packages. The compensation for loss in the case of Nekopos is 3000 yen. There is no further guarantee. The difference after deducting the compensation will not be returned. If you wish to avoid the risk of loss, we will ship via Kuroneko Yamato or Yu-Pack cash on delivery, with the shipping costs borne by the buyer. If you wish to use the above shipping method, please be sure to inform us before purchasing. We will change the listing and relist it. Changes cannot be made after purchase, so it will be shipped via Nekopos. If you purchase it as is, we will assume that you have purchased it with the understanding of the risk of loss during shipping, so please understand. Antique Vintage Old Retro Space Age Watch watch vintage SEIKO CITIZEN Rare Rare Showa Retro Rare