Seiko Cal. 5646 - 776

The Seiko 5646-776 represents an important milestone in Seiko's 1966 lineup. Powered by the 5646 caliber with 23j jewels beating at 28,800 bph, it delivers a 70 hours power reserve. [seikata-wm-6fdacb9f4b20]

Also known as: Tuna, Sea Horse

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

8.8mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

White

Jewels

23j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1966

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