Seiko Cal. 6645 - 736

The Seiko 6645-736 represents an important milestone in Seiko's 1978 lineup. Powered by the 6645 caliber with 32j jewels beating at 21,600 bph, it delivers a 43 hours power reserve. [seikata-wm-197ea6151aec]

Also known as: Silverwave

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

46mm

Case Thickness

14.5mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Cream

Jewels

32j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1978

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