Seiko Cal. 6645 - 878

The Seiko 6645-878 represents an important milestone in Seiko's 1972 lineup. Powered by the 6645 caliber with 31j jewels beating at 36,000 bph, it delivers a 53 hours power reserve. [seikata-wm-18d2dde29712]

Also known as: Rally

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

15.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Green

Jewels

31j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1972

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