Thin, hand-wound Cal. 620 Size: 21mm wide excluding the crown. Lug width is 11mm. The crystal has been polished to its original condition. The strap is a new aftermarket replacement. Suitable for wrists up to approximately 15.5cm. Please refer to the enclosed instruction manual for details on usage precautions. 【About Overhaul】 It may seem old-fashioned, but I find fully automated processes unsettling, so I incorporate a hand-washing step. Disassembly → Hand washing → Ultrasonic cleaning → Final cleaning → Epilame treatment → Assembly → Accuracy adjustment. The mainspring barrel has a very high probability of suffering from the deterioration of grease over time, which can lead to disastrous consequences. Therefore, I do not use grease. Please refrain from purchasing if you dislike this method. The epilame solution uses stearic acid. The movement may appear to have a white film, but that is the epilame film. Epilame solution prevents oil from splashing and also has anti-corrosion and lubricating effects, and is a treatment recommended by various manufacturers. It will better protect the movement until the next overhaul. For the next maintenance, if there are no significant daily variations or unusual issues, it is recommended to consider it in 7-10 years. Depending on the specifications of the item, I adjust it to be within 15 seconds when the mainspring is fully wound. Of course, it depends on the winding of the mainspring and weather conditions. Therefore, the daily variation is within 60 seconds. I handle watches that are about 50 years old. During operation checks, sudden failures or large daily variations may occur depending on the usage conditions. In the case of initial defects (non-functioning or damage upon arrival), we will accept returns. Please contact us within 3 days of receiving the product. Except for the above-mentioned initial defects, we do not provide any warranty for operation, accuracy, or free repairs unless otherwise specified, so please understand this before purchasing. If you wish to have a warranty, please contact our workshop directly. Shipping is via Sagawa Express. Please feel free to send a message if you have any questions.