Seiko Cal. 6618 - 375

The Seiko 6618-375 represents an important milestone in Seiko's 1981 lineup. The Inner Rotating bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-b10f9907bc58]

Also known as: Sumo, Flighty

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

38mm

Case Thickness

8.6mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Green

Jewels

35j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1981

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