Seiko Cal. 4578 - 981

Released in 1971, the Cal. 4578 with design code 981 was part of Seiko's domestic market collection. It features a White dial protected by a Hardlex crystal and offers 200m of water resistance. [seikata-wm-54fec0adddfe]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

36mm

Case Thickness

11.4mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

White

Jewels

32j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1971

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