Seiko Cal. 6646 - 681

This Automatic model from 1967 features a 37mm PVD Black case. It features a Burgundy dial protected by a Sapphire crystal and offers 190m of water resistance. [seikata-wm-d666b3724c8c]

Also known as: Monster

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

37mm

Case Thickness

14.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Burgundy

Jewels

35j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1967

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