Seiko Cal. 5648 - 401

The Seiko 5648-401 represents an important milestone in Seiko's 1977 lineup. Powered by the 5648 caliber with 36j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-1c538024dfc7]

Also known as: Sea Horse, Golden Tuna

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

12.9mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Silver

Jewels

36j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1977

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