Seiko Cal. 6640 - 128

The 6640-128 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6640 caliber with 35j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-fc6779af8dc8]

Also known as: Monster

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

13.8mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1992

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