Seiko Cal. 4591 - 540

The Seiko 4591-540 represents an important milestone in Seiko's 1970 lineup. It features a White dial protected by a Sapphire crystal and offers 60m of water resistance. [seikata-wm-8c73949523dc]

Also known as: Navigator, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

34mm

Case Thickness

9.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

60m

Dial Color

White

Jewels

25j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1970

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