High-quality, high-performance, and highly finished luxury wristwatch. Crown winding (mainspring) - First pull Calendar quickset - Second pull, time adjustment Hacking function - All functions operate normally. Watch case - Newly refinished. Disassembled and cleaned (movement cleaning) on September 6, 2025. Parts inspection (replaced unusable parts). Adjustment made during movement assembly. Oiling (using the finest watch oil). Timegrapher rate measurement device (1 wind to 7 winds, all winds) 6 positions of amplitude and beat error for each wind. Daily rate adjustment (time adjustment) completed. Good accuracy (currently keeping good time). Condition: 【B】 【Unused】Dead stock (unused). 【A】: Considered to be clean for a used item, with almost no scratches or stains. 【B】: In a general condition for a used item. There is a feeling of use, and there may be some scratches and stains. 【C】: A product with noticeable stains or scratches, even considering it as a used item. 【Junk】: Has failed to the point where it cannot be used as a product due to malfunction or damage, or has lost its utility as a product, or is suitable for component extraction and reuse. Please purchase for materials or parts. Products with serious condition defects or missing parts are also included here. *Please check the condition of the product in the images. Although it has been overhauled and is currently running well, due to the age of the item, we cannot guarantee its accuracy. No claims, no returns. Product Description Brand: Seiko Model: King Seiko Ref: 4402-8000 Production year: Estimated May 1966 (early model) Case: All stainless steel, back cover medallion Packing: Back cover packing replaced with a new one Movement: Caliber 4402A 25-jewel mechanical hand-winding, hacking function Calendar quickset function Cannon pinion replaced with a new one Dial: Silver color, index AD dial, rhodium plated Crown: Original early model crown, as is Glass: Windshield replaced with a new 320W01AN (S-12F) 4402-8000 dedicated windshield Case size: Diameter 35.4mm (excluding crown) Length 41.8mm, thickness 11.8mm Band width: 18mm Band: Seiko commercial band, high-quality cowhide Crocodile embossed navy blue ¥4,950, smart change Easy to attach and detach Weight: 50.5g Non-waterproof No accessories