Seiko Caliber Y789 No technical information found for this movement.Watches with the Y789 movementY789-4030Y789-4040Y789-4050Y789-4100Y789-4150Y789-5000Y789-5010Y789-5020Y789-5060Y789-5100Y789-5129Y789-5150Y789-5170Y789-5180Y789-5299Y789-5300Y789-5329Y789-5370Y789-5489Y789-5500Y789-5529Y789-5530Y789-5540Y789-5560Y789-5580Y789-5619Y789-5620Y789-5A00Y789-5A10Y789-5A20Y789-5A40Y789-5A50Y789-5A60Y789-5A70Y789-5A80Y789-5A90Y789-5B00Y789-5B10Y789-5B20Y789-5B50Y789-5B70Y789-5B80Y789-5B90