Seiko Cal. 6640 - 852

The 6640-852 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6640 caliber with 24j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-eab791276d82]

Also known as: Shogun

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

36mm

Case Thickness

11.5mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

90m

Dial Color

Silver

Jewels

24j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1976

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