Seiko Cal. 5664 - 443

Released in 1968, the Cal. 5664 with design code 443 was part of Seiko's domestic market collection. Powered by the 5664 caliber with 18j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-5f294201dd5b]

Also known as: Rally, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

15.2mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Silver

Jewels

18j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1968

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