Seiko Cal. 6644 - 594

The Seiko 6644-594 represents an important milestone in Seiko's 1978 lineup. Powered by the 6644 caliber with 25j jewels beating at 36,000 bph, it delivers a 68 hours power reserve. [seikata-wm-283a2116f53c]

Also known as: Shogun, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

15.1mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Black

Jewels

25j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1978

Related Models

• Seiko 6134-666
• Seiko 6688-451
• Seiko 7157-647
• Seiko 7191-910
• Seiko 6654-538
• Seiko 7045-695
• Seiko 4494-998
• Seiko 0732-527
• Seiko 5275-766
• Seiko 5655-300
• Seiko 5666-381
• Seiko 5254-998