[Product Information] Brand: SEIKO Materials: glass [Product Description] ・Movement: Automatic winding ・Case size (approx.): (width) 38mm x (thickness) 12mm ・Waterproofing performance: Reinforced waterproofing for daily life (10 ATM) ・Calendar (date, day of the week) Size ・Case: Approx. 46 x 42 x 13mm / Weight: Approx. 132g Material ・Case: Stainless steel ・Band: Stainless steel Function ・Mechanical (self-winding) ・100M waterproof ・Calendar display ・See-through back ・Made in Japan ・Accuracy: ±60 seconds per day [Important Note - For Overseas Customers] Thank you for purchasing this product. Please read the following important notes carefully before using this product overseas. 1. Legislation and safety standards This product complies with Japanese safety standards. Please check compatibility with local regulations and safety standards before use in your country. Certain product categories (electronics, cosmetics, food, etc.) may require certification from the importing country. 2.About electrical products This product complies with Japanese power specifications (100V, 50/60Hz). If your country has different power specifications, you will need an appropriate transformer or conversion plug. Using an inappropriate power source may cause malfunction or accident. 3.Language and manual Product instructions and displays may only be in Japanese. The English version of the manual can be downloaded from our website. 4. Warranty and after-sales service International warranty coverage is limited. Please check the warranty for details. After-sales service and repair support overseas may be limited.