Seiko Cal. 4539 - 261

Seiko 4539-261

The 4539-261 is a sought-after Automatic piece from Seiko's golden era. Powered by the 4539 caliber with 28j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-b936a40ae2e3]

Also known as: Sumo, Pogue

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
40mm
Case Thickness
12.9mm
Lug Width
18mm
Crystal
Mineral
Bezel
Fixed
Water Resistance
30m
Dial Color
Navy
Jewels
28j
Frequency
28,800 bph
Power Reserve
52 hours
Year
1989

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