Seikomatic 30 jewels automatic,Seikomatic 30 jewels automatic Cal.603 15031DE / case no. 2014230 , made in Japan.,Origins of the Seikomatic: A 30 jewel Seikomatic 15031D from January 1963 | Adventures in Amateur Watch Fettling,Seiko Matic Diashock 30 Jewels 6201-8950,Seiko Seikomatic Slimdate Diashock 30J,