Seiko Cal. 6278 - 640

The 6278-640 is a sought-after Spring Drive piece from Seiko's golden era. It features a Black dial protected by a Sapphire crystal and offers 50m of water resistance. [seikata-wm-bd65855baa0c]

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

9.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

50m

Dial Color

Black

Jewels

34j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1972

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