Seiko Cal. 5645 - 770

This Hand-Winding model from 1990 features a 42mm Stainless Steel case. Powered by the 5645 caliber with 21j jewels beating at 28,800 bph, it delivers a 61 hours power reserve. [seikata-wm-ed67b4389ba9]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

15.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Green

Jewels

21j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1990

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