Seiko Cal. 6378 - 794

This Spring Drive model from 1976 features a 41mm Two-Tone case. The Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-67843bd08bf8]

Also known as: Navigator, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

15.5mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

160m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1976

Related Models

• Seiko 6244-442
• Seiko 7180-980
• Seiko 7145-648
• Seiko 6653-889
• Seiko 0790-107
• Seiko 0789-155
• Seiko 6124-627
• Seiko 7112-470
• Seiko 6346-811
• Seiko 6178-977
• Seiko 6361-244
• Seiko 6251-872