Seiko Cal. 4431 - 374

Released in 1966, the Cal. 4431 with design code 374 was part of Seiko's domestic market collection. With its 20mm lug width and 13.1mm profile, it sits comfortably on most wrists. [seikata-wm-c86e2ce719bb]

Also known as: Tuna, Arnie

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

43mm

Case Thickness

13.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

60m

Dial Color

White

Jewels

27j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1966

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