Seiko Cal. 6378 - 504

The Seiko 6378-504 represents an important milestone in Seiko's 1991 lineup. Powered by the 6378 caliber with 21j jewels beating at 36,000 bph, it delivers a 40 hours power reserve. [seikata-wm-800fc6d765bd]

Also known as: Arnie

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

10.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Burgundy

Jewels

21j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1991

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