Seiko Cal. 6657 - 500

The Seiko 6657-500 represents an important milestone in Seiko's 1978 lineup. It features a Blue Sunburst dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-9163e44251ae]

Also known as: Navigator

Specifications

Movement

Solar

Case Material

Titanium

Case Width

45mm

Case Thickness

9.9mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1978

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