Seiko Cal. 5665 - 636

The Seiko 5665-636 represents an important milestone in Seiko's 1969 lineup. Powered by the 5665 caliber with 23j jewels beating at 36,000 bph, it delivers a 70 hours power reserve. [seikata-wm-fba40d82c59c]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

46mm

Case Thickness

12.3mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

200m

Dial Color

Champagne

Jewels

23j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1969

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