Seiko Cal. 5640 - 399

The 5640-399 is a sought-after Solar piece from Seiko's golden era. It features a Blue Sunburst dial protected by a Acrylic crystal and offers 120m of water resistance. [seikata-wm-395e92ad02be]

Also known as: Golden Tuna, Flighty

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

44mm

Case Thickness

15.9mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1994

Related Models

• Seiko 4486-481
• Seiko 6174-756
• Seiko 6379-149
• Seiko 0718-959
• Seiko 6342-238
• Seiko 6152-928
• Seiko 6344-707
• Seiko 7141-591
• Seiko 4528-703
• Seiko 0763-278
• Seiko 7074-501
• Seiko 5281-589