Seiko Cal. 6378 - 791

This Hand-Winding model from 1977 features a 44mm PVD Black case. It features a Green dial protected by a Acrylic crystal and offers 200m of water resistance. [seikata-wm-72b56bf1e424]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

44mm

Case Thickness

10.5mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Green

Jewels

19j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1977

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