Seiko Cal. 4491 - 964

Seiko 4491-964

The 4491-964 is a sought-after Automatic piece from Seiko's golden era. Powered by the 4491 caliber with 27j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-b1b945df85b7]

Also known as: Helmet, Sportsmatic

Specifications

Movement
Automatic
Case Material
Gold-Plated
Case Width
46mm
Case Thickness
15.9mm
Lug Width
18mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
140m
Dial Color
Green
Jewels
27j
Frequency
36,000 bph
Power Reserve
51 hours
Year
1988

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