Seiko Cal. 5646 - 587

This Spring Drive model from 1970 features a 46mm Hardlex-Coated Steel case. Powered by the 5646 caliber with 23j jewels beating at 36,000 bph, it delivers a 39 hours power reserve. [seikata-wm-5d4388e17db5]

Also known as: Monster, Goldfeather

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

8.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1970

Related Models

• Seiko 6176-108
• Seiko 3818-510
• Seiko 6674-905
• Seiko 6253-777
• Seiko 6668-858
• Seiko 6288-921
• Seiko 6370-122
• Seiko 4518-978
• Seiko 5659-187
• Seiko 6159-951
• Seiko 6657-781
• Seiko 4587-296