Seiko Cal. 6315 - 939

This Spring Drive model from 1987 features a 39mm PVD Black case. Powered by the 6315 caliber with 31j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-4845a351e665]

Also known as: Monster, Flighty

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

11.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Navy

Jewels

31j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1987

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