Seiko Cal. 4418 - 638

The Seiko 4418-638 represents an important milestone in Seiko's 1978 lineup. It features a Navy dial protected by a Acrylic crystal and offers 120m of water resistance. [seikata-wm-f10986c99b65]

Also known as: Monster, Bullhead

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

46mm

Case Thickness

8.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Navy

Jewels

34j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1978

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