Seiko Cal. 3878 - 521

Released in 1998, the Cal. 3878 with design code 521 was part of Seiko's domestic market collection. It features a Navy dial protected by a Hardlex crystal and offers 170m of water resistance. [seikata-wm-dc478db3d2ff]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

14.8mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

170m

Dial Color

Navy

Jewels

18j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1998

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