Seiko Cal. 6391 - 540

This Spring Drive model from 1973 features a 45mm PVD Black case. It features a Green dial protected by a Mineral crystal and offers 80m of water resistance. [seikata-wm-c7af84de1b4f]

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

9.5mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Green

Jewels

24j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1973

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