Model/Reference: 4206-0510.
Caliber: Seiko 4206.
Movement Type: Mechanical Automatic with Manual Winding capability.
Technical Specs:
Jewels: 17 Jewels.
Frequency: 21,600 beats per hour (bph).
Power Reserve: Approximately 40 hours when fully wound.
Case Size: Approximately 24mm to 26mm in diameter.
Design Style: Often nicknamed the "Seiko Datejust" due to its fluted bezel and two-tone jubilee bracelet, which resemble the iconic Rolex design.
Materials: Stainless steel case with a gold-plated (SGP) or base metal fluted bezel.
Dial: Gold/Champagne dial with a day-date window at the 3 o'clock position.
Crystal: Mineral glass.
Using the serial number visible on the caseback (570985):
Year: The first digit "5" indicates the year ended in 5.
Month: The second digit "7" represents July
Quickset Day/Date: The day and date can be adjusted quickly by pulling the crown to the first click. Turning it one way changes the date, and the other way changes the day.
Bilingual Day: The day wheel typically features two languages (e.g., English and Roman numerals).
Water Resistance: The caseback is marked "Water Resistant," though for a vintage piece, it should only be considered splash-resistant and kept away from significant water exposure.
Thanks for interest this item anything else please send us we prompt to serve.
Regards