Seiko Cal. 6657 - 620

Released in 1998, the Cal. 6657 with design code 620 was part of Seiko's domestic market collection. It features a Blue Sunburst dial protected by a Mineral crystal and offers 40m of water resistance. [seikata-wm-138349a978a3]

Also known as: Crown

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

15.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1998

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