Seiko Cal. 6638 - 377

The 6638-377 is a sought-after Kinetic piece from Seiko's golden era. With its 18mm lug width and 8.5mm profile, it sits comfortably on most wrists. [seikata-wm-f2ca45a12a52]

Also known as: UFO

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

37mm

Case Thickness

8.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Navy

Jewels

28j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1992

Related Models

• Seiko 6316-317
• Seiko 4593-939
• Seiko 5624-871
• Seiko 4540-871
• Seiko 5645-697
• Seiko 7176-277
• Seiko 6617-111
• Seiko 6691-394
• Seiko 7070-356
• Seiko 5270-609
• Seiko 6394-958
• Seiko 4430-946