Seiko Cal. 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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