Seiko Cal. 6121 - 137

This Hand-Winding model from 1966 features a 40mm Two-Tone case. Powered by the 6121 caliber with 28j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-ff4d296b7531]

Also known as: Monster, Flighty

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

40mm

Case Thickness

10.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

170m

Dial Color

Green

Jewels

28j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1966

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