Seiko Cal. 6390 - 431

The 6390-431 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6390 caliber with 27j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-7abfadf26cb9]

Also known as: Samurai, Baby Tuna

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

43mm

Case Thickness

15.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

White

Jewels

27j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1968

Related Models

• Seiko 6188-402
• Seiko 3830-906
• Seiko 3877-605
• Seiko 4533-407
• Seiko 6178-360
• Seiko 6343-737
• Seiko 4430-518
• Seiko 7188-702
• Seiko 4493-241
• Seiko 6159-185
• Seiko 7162-195
• Seiko 7117-389