Seiko Cal. 6616 - 540

The Seiko 6616-540 represents an important milestone in Seiko's 1969 lineup. It features a Green dial protected by a Hardlex crystal and offers 70m of water resistance. [seikata-wm-43a481f5cadd]

Also known as: Shogun, Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

12.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

70m

Dial Color

Green

Jewels

28j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1969

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