Seiko Cal. 7040 - 440

Released in 1968, the Cal. 7040 with design code 440 was part of Seiko's domestic market collection. With its 20mm lug width and 11.1mm profile, it sits comfortably on most wrists. [seikata-wm-76a0bbf844cf]

Also known as: Silverwave, Navigator

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

11.1mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

29j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1968

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