Seiko Cal. 4550 - 666

This Hand-Winding model from 1978 features a 40mm PVD Black case. It features a Green dial protected by a Acrylic crystal and offers 70m of water resistance. [seikata-wm-dec1580f2b4a]

Also known as: Helmet, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

40mm

Case Thickness

15.0mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Green

Jewels

33j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1978

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