Seiko Cal. 7164 - 641

The Seiko 7164-641 represents an important milestone in Seiko's 1978 lineup. It features a Green dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-3759a806f675]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

35mm

Case Thickness

9.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

140m

Dial Color

Green

Jewels

33j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1978

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