Seiko Cal. 6658 - 770

Released in 1987, the Cal. 6658 with design code 770 was part of Seiko's domestic market collection. It features a Silver dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-096c4a8040e5]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

41mm

Case Thickness

13.3mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Silver

Jewels

30j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1987

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