Seiko Cal. 5664 - 827

The Seiko 5664-827 represents an important milestone in Seiko's 1965 lineup. Powered by the 5664 caliber with 32j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-fb228ce5d561]

Also known as: Helmet, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

12.0mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

130m

Dial Color

Green

Jewels

32j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1965

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