Seiko Cal. 6310 - 640

The Seiko 6310-640 represents an important milestone in Seiko's 1980 lineup. It features a Green dial protected by a Mineral crystal and offers 70m of water resistance. [seikata-wm-1116f15d13c0]

Also known as: Crown, Flighty

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

9.7mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Green

Jewels

28j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1980

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