Seiko Cal. 6661 - 878

The Seiko 6661-878 represents an important milestone in Seiko's 1966 lineup. Powered by the 6661 caliber with 28j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-57735bc3e494]

Also known as: Navigator, Flighty

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

8.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

White

Jewels

28j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1966

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