Seiko Cal. 5656 - 639

The Seiko 5656-639 represents an important milestone in Seiko's 1979 lineup. It features a Cream dial protected by a Mineral crystal and offers 160m of water resistance. [seikata-wm-42883437d28c]

Also known as: Navigator, Golden Tuna

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

35mm

Case Thickness

9.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Cream

Jewels

32j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1979

Related Models

• Seiko 3873-327
• Seiko 7153-464
• Seiko 5680-530
• Seiko 6662-334
• Seiko 5250-974
• Seiko 5251-146
• Seiko 3897-539
• Seiko 4545-662
• Seiko 6352-232
• Seiko 7081-430
• Seiko 6229-173
• Seiko 5663-501