Seiko Cal. 5638 - 665

This Solar model from 1986 features a 36mm Two-Tone case. It features a Blue Sunburst dial protected by a Sapphire crystal and offers 200m of water resistance. [seikata-wm-c551d72449c4]

Also known as: Tuna, Sea Horse

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

36mm

Case Thickness

8.0mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

22j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1986

Related Models

• Seiko 5289-827
• Seiko 6650-882
• Seiko 6651-431
• Seiko 4436-727
• Seiko 4563-708
• Seiko 6281-993
• Seiko 5622-104
• Seiko 7032-137
• Seiko 6363-726
• Seiko 5662-499
• Seiko 4540-866
• Seiko 5663-677