Seiko Cal. 6642 - 574

The Seiko 6642-574 represents an important milestone in Seiko's 1965 lineup. Powered by the 6642 caliber with 19j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-deb7a908eb05]

Also known as: Helmet, Crown

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

12.2mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Navy

Jewels

19j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1965

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