Seiko Cal. 5665 - 387

The 5665-387 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5665 caliber with 21j jewels beating at 21,600 bph, it delivers a 66 hours power reserve. [seikata-wm-edb2fdae1683]

Also known as: Tuna, Emperor

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

15.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

50m

Dial Color

White

Jewels

21j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1997

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