Seiko Cal. 6337 - 436

This Spring Drive model from 1987 features a 45mm PVD Black case. The Inner Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-269bb9353bf6]

Also known as: Tuna, World Timer

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

14.2mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Navy

Jewels

26j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1987

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