Seiko Cal. 4489 - 746

Seiko 4489-746

The Seiko 4489-746 represents an important milestone in Seiko's 1971 lineup. Powered by the 4489 caliber with 25j jewels beating at 21,600 bph, it delivers a 39 hours power reserve. [seikata-wm-8a92cfa7b09a]

Also known as: Sportsmatic, Baby Tuna

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
36mm
Case Thickness
8.6mm
Lug Width
18mm
Crystal
Mineral
Bezel
Fixed
Water Resistance
130m
Dial Color
Silver
Jewels
25j
Frequency
21,600 bph
Power Reserve
39 hours
Year
1971

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