Seiko Cal. 5634 - 327

The Seiko 5634-327 represents an important milestone in Seiko's 1970 lineup. Powered by the 5634 caliber with 21j jewels beating at 36,000 bph, it delivers a 67 hours power reserve. [seikata-wm-eaf71106719e]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

34mm

Case Thickness

8.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Navy

Jewels

21j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1970

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