Seiko Cal. 6640 - 789

The 6640-789 is a sought-after Automatic piece from Seiko's golden era. It features a Burgundy dial protected by a Mineral crystal and offers 180m of water resistance. [seikata-wm-d7f15b55b321]

Also known as: Shogun

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

37mm

Case Thickness

10.7mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

180m

Dial Color

Burgundy

Jewels

25j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1977

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