Seiko Cal. 6640 - 219

The Seiko 6640-219 represents an important milestone in Seiko's 1977 lineup. It features a Black dial protected by a Mineral crystal and offers 100m of water resistance. [seikata-wm-7e07ad5c36af]

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

46mm

Case Thickness

10.7mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Black

Jewels

17j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1977

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