Seiko Cal. 6621 - 738

The Seiko 6621-738 represents an important milestone in Seiko's 1987 lineup. It features a Green dial protected by a Sapphire crystal and offers 180m of water resistance. [seikata-wm-09ca015a5716]

Also known as: Emperor

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

14.4mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

180m

Dial Color

Green

Jewels

18j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1987

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