Seiko Cal. 5660 - 549

The 5660-549 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Navy dial protected by a Sapphire crystal and offers 180m of water resistance. [seikata-wm-7847e80d1fb0]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

43mm

Case Thickness

9.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Navy

Jewels

27j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1981

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