Seiko Cal. 5631 - 384

The 5631-384 is a sought-after Hand-Winding piece from Seiko's golden era. The Rotating bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-dba8caf069c6]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

14.0mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

30m

Dial Color

Silver

Jewels

34j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1967

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