Seiko Cal. 5640 - 754

The 5640-754 is a sought-after Spring Drive piece from Seiko's golden era. It features a White dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-5d59d98ac735]

Also known as: Tuna, Emperor

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

14.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

30m

Dial Color

White

Jewels

17j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1990

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