Seiko Cal. 6656 - 381

This Hand-Winding model from 1966 features a 37mm Hardlex-Coated Steel case. With its 22mm lug width and 10.3mm profile, it sits comfortably on most wrists. [seikata-wm-b9e3fb7baca4]

Also known as: Panda, UFO

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

10.3mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Silver

Jewels

31j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1966

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