Seiko Cal. 6377 - 140

The 6377-140 is a sought-after Spring Drive piece from Seiko's golden era. With its 21mm lug width and 15.0mm profile, it sits comfortably on most wrists. [seikata-wm-d1bbce29fb66]

Also known as: Sumo, Bullhead

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

46mm

Case Thickness

15.0mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

190m

Dial Color

Silver

Jewels

32j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1966

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