Seiko Cal. 6646 - 916

This Spring Drive model from 1969 features a 37mm Stainless Steel case. It features a Burgundy dial protected by a Mineral crystal and offers 90m of water resistance. [seikata-wm-437950ed4c19]

Also known as: Sea Horse, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

15.5mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Burgundy

Jewels

24j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1969

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