Seiko Cal. 6391 - 638

Released in 1972, the Cal. 6391 with design code 638 was part of Seiko's domestic market collection. With its 19mm lug width and 8.4mm profile, it sits comfortably on most wrists. [seikata-wm-cf814cce9e59]

Also known as: Rally, Navigator

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

46mm

Case Thickness

8.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

32j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1972

Related Models

• Seiko 4424-258
• Seiko 6379-446
• Seiko 4528-907
• Seiko 7068-905
• Seiko 3827-195
• Seiko 3845-646
• Seiko 4419-992
• Seiko 5639-530
• Seiko 6228-112
• Seiko 6129-866
• Seiko 0770-648
• Seiko 3831-364