Seiko Cal. 6641 - 348

The Seiko 6641-348 represents an important milestone in Seiko's 1987 lineup. With its 21mm lug width and 10.4mm profile, it sits comfortably on most wrists. [seikata-wm-f5cf7dcbcf4e]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

10.4mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1987

Related Models

• Seiko 4474-775
• Seiko 4553-553
• Seiko 7094-143
• Seiko 6285-322
• Seiko 3889-501
• Seiko 4569-970
• Seiko 6639-305
• Seiko 4489-784
• Seiko 3847-305
• Seiko 0744-168
• Seiko 7136-226
• Seiko 6136-573