Seiko Cal. 5641 - 673

This Hand-Winding model from 1967 features a 43mm PVD Black case. Powered by the 5641 caliber with 19j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-e9ae9a7538ac]

Also known as: Helmet, Silverwave

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

43mm

Case Thickness

12.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Burgundy

Jewels

19j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1967

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