Seiko Cal. 6657 - 672

The 6657-672 is a sought-after Spring Drive piece from Seiko's golden era. It features a Black dial protected by a Acrylic crystal and offers 100m of water resistance. [seikata-wm-ec253982d0b3]

Also known as: Bellmatic, Emperor

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

36mm

Case Thickness

12.2mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

100m

Dial Color

Black

Jewels

19j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1966

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