Seiko Cal. 6378 - 745

The 6378-745 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6378 caliber with 22j jewels beating at 21,600 bph, it delivers a 41 hours power reserve. [seikata-wm-73eaa95cabf0]

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

11.4mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

90m

Dial Color

Burgundy

Jewels

22j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1965

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