Seiko Cal. 5278 - 440

Released in 1966, the Cal. 5278 with design code 440 was part of Seiko's domestic market collection. It features a Champagne dial protected by a Hardlex crystal and offers 100m of water resistance. [seikata-wm-3dbc61572bb8]

Also known as: Sumo, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

13.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Champagne

Jewels

26j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1966

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