Seiko Cal. 4478 - 681

Released in 1981, the Cal. 4478 with design code 681 was part of Seiko's domestic market collection. It features a Green dial protected by a Sapphire crystal and offers 160m of water resistance. [seikata-wm-3e28be983cae]

Also known as: Silverwave, Emperor

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

8.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Green

Jewels

30j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1981

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