Seiko Cal. 6645 - 540

The Seiko 6645-540 represents an important milestone in Seiko's 1986 lineup. It features a White dial protected by a Sapphire crystal and offers 130m of water resistance. [seikata-wm-ad440530fda2]

Also known as: Golden Tuna

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

42mm

Case Thickness

15.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

130m

Dial Color

White

Jewels

28j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1986

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