Seiko Cal. 5640 - 388

This Hand-Winding model from 1969 features a 39mm Gold-Plated case. Powered by the 5640 caliber with 36j jewels beating at 21,600 bph, it delivers a 45 hours power reserve. [seikata-wm-9f4e2a8a9393]

Also known as: Goldfeather

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

14.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1969

Related Models

• Seiko 0775-529
• Seiko 4542-195
• Seiko 7059-431
• Seiko 6656-687
• Seiko 5633-379
• Seiko 6334-461
• Seiko 6324-250
• Seiko 6391-290
• Seiko 6380-979
• Seiko 6258-328
• Seiko 6610-833
• Seiko 3844-830