Seiko Cal. 4478 - 403

The 4478-403 is a sought-after Spring Drive piece from Seiko's golden era. It features a Burgundy dial protected by a Hardlex crystal and offers 90m of water resistance. [seikata-wm-c3383eec1e1a]

Also known as: Sumo, Bullhead

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

13.3mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

90m

Dial Color

Burgundy

Jewels

21j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1977

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