Seiko Cal. 5646 - 367

This Spring Drive model from 1976 features a 40mm PVD Black case. It features a White dial protected by a Sapphire crystal and offers 50m of water resistance. [seikata-wm-97fdb4ecd1d2]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

13.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

50m

Dial Color

White

Jewels

18j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1976

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