Seiko Cal. 4491 - 590

The 4491-590 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4491 caliber with 36j jewels beating at 36,000 bph, it delivers a 68 hours power reserve. [seikata-wm-7bbf7a59695d]

Also known as: Baby Tuna, Arnie

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

12.4mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

170m

Dial Color

Silver

Jewels

36j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1985

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