Seiko Cal. 5640 - 765

The 5640-765 is a sought-after Solar piece from Seiko's golden era. It features a Silver dial protected by a Mineral crystal and offers 40m of water resistance. [seikata-wm-7627bfc9af9b]

Also known as: Golden Tuna

Specifications

Movement

Solar

Case Material

Titanium

Case Width

44mm

Case Thickness

8.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Silver

Jewels

27j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1998

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