Seiko Cal. 4431 - 623

The Seiko 4431-623 represents an important milestone in Seiko's 1975 lineup. With its 21mm lug width and 8.9mm profile, it sits comfortably on most wrists. [seikata-wm-b949b053862e]

Also known as: Panda, Crown

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

40mm

Case Thickness

8.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

140m

Dial Color

Black

Jewels

17j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1975

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