Seiko Cal. 4438 - 687

The 4438-687 is a sought-after Spring Drive piece from Seiko's golden era. The Coin-Edge bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-12f0fb0d0d3c]

Also known as: Rally, Flighty

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

46mm

Case Thickness

10.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Navy

Jewels

23j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1972

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