Seiko Cal. 6640 - 526

This Automatic model from 1991 features a 44mm Gold-Plated case. Powered by the 6640 caliber with 36j jewels beating at 21,600 bph, it delivers a 62 hours power reserve. [seikata-wm-d1346ae92834]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

12.7mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Green

Jewels

36j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1991

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