Seiko Cal. 6668 - 904

The 6668-904 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6668 caliber with 18j jewels beating at 21,600 bph, it delivers a 39 hours power reserve. [seikata-wm-ec60a44fc5d9]

Also known as: Turtle, Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

42mm

Case Thickness

11.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Silver

Jewels

18j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1983

Related Models

• Seiko 4412-628
• Seiko 6233-411
• Seiko 7173-455
• Seiko 4450-846
• Seiko 4495-591
• Seiko 0783-221
• Seiko 6248-658
• Seiko 7093-595
• Seiko 5291-391
• Seiko 6660-177
• Seiko 6357-401
• Seiko 7075-916