Seiko Cal. 5638 - 347

The 5638-347 is a sought-after Quartz piece from Seiko's golden era. It features a Black dial protected by a Acrylic crystal and offers 140m of water resistance. [seikata-wm-d0eecc9facd3]

Also known as: Helmet, Flighty

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

35mm

Case Thickness

9.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Black

Jewels

17j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1970

Related Models

• Seiko 4415-407
• Seiko 3890-239
• Seiko 6399-181
• Seiko 6656-924
• Seiko 0756-251
• Seiko 0720-813
• Seiko 0737-956
• Seiko 4444-737
• Seiko 3886-672
• Seiko 5611-750
• Seiko 6326-175
• Seiko 0798-253