Seiko Cal. 6311 - 502

This Spring Drive model from 1970 features a 39mm PVD Black case. It features a Green dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-a0ef133d8db6]

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

14.7mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Green

Jewels

35j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1970

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