Seiko Cal. 5648 - 377

The Seiko 5648-377 represents an important milestone in Seiko's 1972 lineup. Powered by the 5648 caliber with 29j jewels beating at 36,000 bph, it delivers a 58 hours power reserve. [seikata-wm-b4987dea039e]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

43mm

Case Thickness

11.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1972

Related Models

• Seiko 5212-338
• Seiko 3820-403
• Seiko 5688-157
• Seiko 7092-984
• Seiko 4595-337
• Seiko 6398-369
• Seiko 6215-605
• Seiko 4539-857
• Seiko 6185-292
• Seiko 6610-883
• Seiko 5217-786
• Seiko 5698-884