Seiko Cal. 6645 - 581

Released in 1983, the Cal. 6645 with design code 581 was part of Seiko's domestic market collection. It features a White dial protected by a Hardlex crystal and offers 140m of water resistance. [seikata-wm-040e94aa83bb]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

11.2mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

140m

Dial Color

White

Jewels

35j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1983

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