Seiko Cal. 6661 - 377

The Seiko 6661-377 represents an important milestone in Seiko's 1975 lineup. Powered by the 6661 caliber with 27j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-b7b18a71b61e]

Also known as: Monster, Navigator

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

12.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

170m

Dial Color

Champagne

Jewels

27j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1975

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