Seiko Cal. 5640 - 546

The 5640-546 is a sought-after Spring Drive piece from Seiko's golden era. It features a Black dial protected by a Hardlex crystal and offers 60m of water resistance. [seikata-wm-aa4e38e2d59b]

Also known as: World Timer, Flighty

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

34mm

Case Thickness

11.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

60m

Dial Color

Black

Jewels

21j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1986

Related Models

• Seiko 7026-964
• Seiko 6335-701
• Seiko 7067-131
• Seiko 6228-695
• Seiko 5253-521
• Seiko 6123-527
• Seiko 3858-769
• Seiko 6140-543
• Seiko 7030-848
• Seiko 5664-901
• Seiko 3875-688
• Seiko 4473-200