Seiko Cal. 6313 - 640

The Seiko 6313-640 represents an important milestone in Seiko's 1975 lineup. It features a Burgundy dial protected by a Hardlex crystal and offers 60m of water resistance. [seikata-wm-59c6b5bb38e6]

Also known as: Monster

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

40mm

Case Thickness

10.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Burgundy

Jewels

35j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1975

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