Seiko Cal. 6658 - 155

This Hand-Winding model from 1975 features a 40mm PVD Black case. Powered by the 6658 caliber with 20j jewels beating at 36,000 bph, it delivers a 60 hours power reserve. [seikata-wm-2cd95e910532]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

40mm

Case Thickness

8.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Burgundy

Jewels

20j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1975

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