Seiko Cal. 5640 - 723

The Seiko 5640-723 represents an important milestone in Seiko's 1968 lineup. The Coin-Edge bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-5099f4ce1316]

Also known as: Panda, Navigator

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

43mm

Case Thickness

9.9mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Green

Jewels

26j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1968

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