Seiko Cal. 6240 - 870

This Spring Drive model from 1980 features a 39mm Two-Tone case. Powered by the 6240 caliber with 34j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-ef05b8118c51]

Also known as: Monster, Rally

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

39mm

Case Thickness

8.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

150m

Dial Color

Navy

Jewels

34j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1980

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