Seiko Cal. 6645 - 159

The Seiko 6645-159 represents an important milestone in Seiko's 1980 lineup. Powered by the 6645 caliber with 23j jewels beating at 28,800 bph, it delivers a 53 hours power reserve. [seikata-wm-5b30293c265f]

Also known as: Sumo

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

36mm

Case Thickness

9.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Silver

Jewels

23j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1980

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