Seiko Cal. 5647 - 278

This Spring Drive model from 1973 features a 37mm Hardlex-Coated Steel case. Powered by the 5647 caliber with 20j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-01e23c5bffc8]

Also known as: Bellmatic, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

9.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Navy

Jewels

20j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1973

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