Seiko Cal. 5287 - 784

The 5287-784 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5287 caliber with 17j jewels beating at 28,800 bph, it delivers a 51 hours power reserve. [seikata-wm-64299a4f6ae3]

Also known as: Sumo, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

9.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Navy

Jewels

17j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1990

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