Seiko Cal. 7147 - 305

This Spring Drive model from 1973 features a 43mm Two-Tone case. It features a Blue Sunburst dial protected by a Mineral crystal and offers 180m of water resistance. [seikata-wm-195754ccd9d5]

Also known as: Sumo, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

43mm

Case Thickness

8.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1973

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