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 29j jewels beating at 36,000 bph, it delivers a 68 hours power reserve. [seikata-wm-115af99a2dcb]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

38mm

Case Thickness

15.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

140m

Dial Color

Burgundy

Jewels

29j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1989

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