Seiko Cal. 6138 - 840

This Automatic model from 1991 features a 37mm Two-Tone case. Powered by the 6138 caliber with 18j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-2c9758df5d4d]

Also known as: Sumo, Crown

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

37mm

Case Thickness

12.2mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1991

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