Seiko Cal. 6623 - 637

The Seiko 6623-637 represents an important milestone in Seiko's 1969 lineup. The Fixed bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-eb81351135a5]

Also known as: Navigator, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

13.3mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

50m

Dial Color

Navy

Jewels

26j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1969

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