Seiko Cal. 5638 - 794

Released in 1987, the Cal. 5638 with design code 794 was part of Seiko's domestic market collection. The Coin-Edge bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-821fd5ff35a5]

Also known as: Tuna, Navigator

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

14.5mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Cream

Jewels

20j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1987

Related Models

• Seiko 5293-421
• Seiko 6155-160
• Seiko 3895-331
• Seiko 5259-907
• Seiko 7029-316
• Seiko 7170-330
• Seiko 5645-431
• Seiko 4527-599
• Seiko 4480-416
• Seiko 3836-293
• Seiko 6342-785
• Seiko 5214-360