Seiko Cal. 3840 - 669

The Seiko 3840-669 represents an important milestone in Seiko's 1965 lineup. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 30m of water resistance. [seikata-wm-d551613f2436]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

8.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1965

Related Models

• Seiko 0711-773
• Seiko 7162-868
• Seiko 6343-891
• Seiko 6328-975
• Seiko 7137-593
• Seiko 6251-803
• Seiko 4530-655
• Seiko 6198-918
• Seiko 7073-165
• Seiko 6643-696
• Seiko 6251-464
• Seiko 4411-303