Seiko Cal. 6618 - 312

The Seiko 6618-312 represents an important milestone in Seiko's 1978 lineup. It features a Green dial protected by a Sapphire crystal and offers 40m of water resistance. [seikata-wm-ab83c99bbde0]

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

12.9mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

40m

Dial Color

Green

Jewels

24j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1978

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