Seiko Cal. 6378 - 789

Seiko 6378-789

The 6378-789 is a sought-after Automatic piece from Seiko's golden era. It features a Black dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-616ef1e66509]

Also known as: Sumo, Flighty

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
42mm
Case Thickness
13.4mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
140m
Dial Color
Black
Jewels
30j
Frequency
36,000 bph
Power Reserve
59 hours
Year
1974

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