Seiko Cal. 4437 - 678

The Seiko 4437-678 represents an important milestone in Seiko's 1974 lineup. Powered by the 4437 caliber with 25j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-c614154bcdc7]

Also known as: Sea Horse, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

36mm

Case Thickness

9.4mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Navy

Jewels

25j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1974

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