Seiko Cal. 5640 - 407

The Seiko 5640-407 represents an important milestone in Seiko's 1992 lineup. The Coin-Edge bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-876034e93305]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

44mm

Case Thickness

14.2mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Silver

Jewels

23j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1992

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