Seiko Cal. 6648 - 537

This Spring Drive model from 1970 features a 40mm PVD Black case. Powered by the 6648 caliber with 23j jewels beating at 28,800 bph, it delivers a 44 hours power reserve. [seikata-wm-41e8b30a99c7]

Also known as: Shogun

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

8.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

170m

Dial Color

Cream

Jewels

23j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1970

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