Seiko Cal. 5663 - 421

The 5663-421 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5663 caliber with 28j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-59316aeb2cf0]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

10.4mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Silver

Jewels

28j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1970

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