Seiko Cal. 5648 - 744

The Seiko 5648-744 represents an important milestone in Seiko's 1967 lineup. Powered by the 5648 caliber with 31j jewels beating at 28,800 bph, it delivers a 61 hours power reserve. [seikata-wm-817410214276]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

41mm

Case Thickness

8.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1967

Related Models

• Seiko 4548-528
• Seiko 6296-503
• Seiko 4499-608
• Seiko 7078-835
• Seiko 6640-107
• Seiko 6243-182
• Seiko 0720-756
• Seiko 7149-129
• Seiko 7144-948
• Seiko 7171-538
• Seiko 6672-848
• Seiko 0797-751