Seiko Cal. 4447 - 257

The Seiko 4447-257 represents an important milestone in Seiko's 1971 lineup. It features a White dial protected by a Mineral crystal and offers 120m of water resistance. [seikata-wm-814759341889]

Also known as: Silverwave

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

36mm

Case Thickness

10.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

120m

Dial Color

White

Jewels

21j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1971

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