Seiko Cal. 6668 - 904

Seiko 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

seikata-wm-ec60a44fc5d9