Hello.Thank you for giving a time. Welcome to the auction. Seiko cal.2411 -Very Rare-Vintage All Stainless Steel Roman Numerals Tank Case A perfect collector's watch. Case witdth 28 mm (30mm with crown) Lug 19 mm. Well maintained and clean Bid knowing that it is a used product. I will ship it securely. Seiko's hi-beat 2411 caliber mechanism is a symbol of innovation and excellence in the watch industry. This special mechanism operates with faster vibrations per second, allowing for extremely precise timekeeping. The high beat rate enables the watch to maintain more accurate timekeeping, providing users with a unique timekeeping experience. Additionally, this mechanism is crafted with Seiko's precision-engineered components and high-quality materials, promising long-lasting performance in terms of durability and reliability. Seiko's 2411 caliber mechanism promises watch enthusiasts a pioneering journey in pursuit of excellence and innovation.