Seiko Cal. 5640 - 305

The 5640-305 is a sought-after Quartz piece from Seiko's golden era. It features a Silver dial protected by a Mineral crystal and offers 130m of water resistance. [seikata-wm-023b482d141d]

Also known as: Monster

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

39mm

Case Thickness

15.2mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Silver

Jewels

20j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1990

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