Seiko Cal. 6645 - 188

The Seiko 6645-188 represents an important milestone in Seiko's 1969 lineup. The Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-dd18190c2270]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

40mm

Case Thickness

13.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

90m

Dial Color

Green

Jewels

28j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1969

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