Seiko Cal. 6657 - 750

The Seiko 6657-750 represents an important milestone in Seiko's 1990 lineup. It features a Champagne dial protected by a Mineral crystal and offers 160m of water resistance. [seikata-wm-0d546505b2c1]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

42mm

Case Thickness

15.5mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

160m

Dial Color

Champagne

Jewels

25j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1990

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