Seiko Cal. 6377 - 558

The Seiko 6377-558 represents an important milestone in Seiko's 1976 lineup. Powered by the 6377 caliber with 17j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-9ca89b713d18]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

40mm

Case Thickness

9.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

80m

Dial Color

Burgundy

Jewels

17j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1976

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