Seiko Cal. 5648 - 754

The 5648-754 is a sought-after Spring Drive piece from Seiko's golden era. The Bidirectional bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-2b02aa0ea154]

Also known as: Monster, Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

8.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

30j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1974

Related Models

• Seiko 4457-955
• Seiko 4566-280
• Seiko 0771-976
• Seiko 6234-647
• Seiko 6634-647
• Seiko 5274-344
• Seiko 6159-452
• Seiko 0799-620
• Seiko 6259-590
• Seiko 0735-226
• Seiko 4467-483
• Seiko 3836-544