Seiko Cal. 5240 - 276

The Seiko 5240-276 represents an important milestone in Seiko's 1978 lineup. Powered by the 5240 caliber with 34j jewels beating at 28,800 bph, it delivers a 59 hours power reserve. [seikata-wm-c8595f4758af]

Also known as: Monster, Sumo

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

35mm

Case Thickness

13.6mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Green

Jewels

34j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1978

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