Seiko Cal. 5637 - 275

The 5637-275 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5637 caliber with 25j jewels beating at 28,800 bph, it delivers a 68 hours power reserve. [seikata-wm-556853f5e9cf]

Also known as: Emperor

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

14.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

30m

Dial Color

Green

Jewels

25j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1965

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