Seiko Cal. 5648 - 537

This Hand-Winding model from 1977 features a 41mm PVD Black case. Powered by the 5648 caliber with 23j jewels beating at 28,800 bph, it delivers a 71 hours power reserve. [seikata-wm-cae647f98e12]

Also known as: Monster

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

41mm

Case Thickness

9.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Champagne

Jewels

23j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1977

Related Models

• Seiko 6375-832
• Seiko 7039-267
• Seiko 3870-452
• Seiko 7188-216
• Seiko 5626-124
• Seiko 6233-572
• Seiko 4454-797
• Seiko 4594-511
• Seiko 7010-727
• Seiko 4581-673
• Seiko 6272-325
• Seiko 6626-960