Seiko Cal. 6657 - 387

This Automatic model from 1970 features a 39mm PVD Black case. It features a Navy dial protected by a Sapphire crystal and offers 190m of water resistance. [seikata-wm-829bd5aaf75d]

Also known as: Crown

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

39mm

Case Thickness

9.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

190m

Dial Color

Navy

Jewels

25j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1970

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