Seiko Cal. 6640 - 397

The Seiko 6640-397 represents an important milestone in Seiko's 1996 lineup. It features a Cream dial protected by a Sapphire crystal and offers 50m of water resistance. [seikata-wm-6270cb45a5bb]

Also known as: Emperor

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

43mm

Case Thickness

8.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Cream

Jewels

17j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1996

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