Seiko Cal. 6399 - 904

This Hand-Winding model from 1974 features a 37mm Titanium case. Powered by the 6399 caliber with 18j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-63a601d9cb66]

Also known as: Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

37mm

Case Thickness

12.9mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

180m

Dial Color

Cream

Jewels

18j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1974

Related Models

• Seiko 6136-159
• Seiko 3880-929
• Seiko 6222-947
• Seiko 4430-981
• Seiko 3861-479
• Seiko 6182-243
• Seiko 0784-878
• Seiko 6245-494
• Seiko 5657-914
• Seiko 5663-296
• Seiko 5212-271
• Seiko 0797-476