Seiko Cal. 6640 - 520

Seiko 6640-520

This Automatic model from 1978 features a 46mm PVD Black case. The Coin-Edge bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-12f17b8d1dfb]

Also known as: Bullhead

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
46mm
Case Thickness
10.4mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
170m
Dial Color
Silver
Jewels
29j
Frequency
21,600 bph
Power Reserve
38 hours
Year
1978

Related Models

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