Seiko Cal. 6639 - 540

Released in 1996, the Cal. 6639 with design code 540 was part of Seiko's domestic market collection. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 80m of water resistance. [seikata-wm-8df25bb68751]

Also known as: Goldfeather, World Timer

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

13.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1996

Related Models

• Seiko 6324-920
• Seiko 7091-507
• Seiko 4450-481
• Seiko 3887-326
• Seiko 4548-297
• Seiko 4436-591
• Seiko 4565-310
• Seiko 7114-458
• Seiko 6169-800
• Seiko 0757-239
• Seiko 7129-834
• Seiko 6130-673