Seiko Cal. 4591 - 851

Released in 1966, the Cal. 4591 with design code 851 was part of Seiko's domestic market collection. Powered by the 4591 caliber with 31j jewels beating at 36,000 bph, it delivers a 47 hours power reserve. [seikata-wm-b25a16906623]

Also known as: Monster, Rally

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

11.4mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Silver

Jewels

31j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1966

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