Seiko's Grammar of Design

Taro Tanaka.

Introduced beginning in 1961.

Examples:

1961.04: Seikomatic 603 (Suwa Seikosha):

1961.07: King Seiko First model (Daini Seikosha): J14102E

1962.10: King Seiko Second model (Daini Seikosha): 15034 (later the 5440-1990) - faceted lugs (case design later re-used in its replacement, the third-generation 442000 and 44-2000)

1963: Liner Chronometer (Suwa Seikosha):

1963.07: Seikomatic Weekdater (Suwa Seikosha): J13080, calibre 400.

1963.08: Second-generation Grand Seiko (Suwa Seikosha): 43999

1963.12: King Seiko Chronometer (Daini Seikosha): 49999 (later became the 4420-9990 from January 1965)

Early 1964: 44KS (Daini Seikosha): 44999 (later became the 44-9990.

1964.04: Seikomatic Weekdater (Suwa Seikosha): 6218-8970

1964: Seiko Cronos Self Dater Water Proof (Daini Seikosha): 718990

(1964.03: World Time (Suwa Seikosha): 6217)

1964: Seiko Crown Chronograph (Suwa Seikosha): 45899

1964.11: Seikomatic Weekdater (Suwa Seikosha): 6206-8990

1965.02: Seikomatic Weekdater (Suwa Seikosha): 6218-8950

1965.07: Seikomatic Chronometer (Suwa Seikosha): 6245/6-9000.

(1965.08: King Seiko Calendar (Daini Seikosha): 4402-8000).

1965.09: Seikomatic Weekdater (Suwa Seikosha): 6206-8040

1965.09: Seikomatic Weekdater (Suwa Seikosha): 6216-9000

1966.01: Seikomatic Weekdater (Suwa Seikosha): 6218-8000

1966: 44GS, Grand Seiko Style (Daini Seikosha): 4420-9000

1966.09: Seikomatic Weekdater (Suwa Seikosha): 6218-8010

Grand Seiko Style evolution of the Grammar of Design - introduced beginning in 1966, with the 44GS.

Examples:

44GS:

45GS:

61GS: