Seiko Serial Numbers Complete Guide and Date - Millenary Watches
Caliber 9R02 | SPRING DRIVE | Movement | About | Grand Seiko
Identify] Legit or Fake? Listed as a Seiko 5 No. 7009 with a 21 jewel movement, numbering on case is 5309-5250. But can't seem to find anything that matches that numbering online. : r/Watches