Seiko Cal. 4438 - 637

The 4438-637 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 4438 caliber with 33j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-8d083ac2b548]

Also known as: Samurai, Panda

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

41mm

Case Thickness

8.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Silver

Jewels

33j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1990

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