Seiko Cal. 3863 - 640

The Seiko 3863-640 represents an important milestone in Seiko's 1969 lineup. It features a Burgundy dial protected by a Sapphire crystal and offers 130m of water resistance. [seikata-wm-f67c7abef049]

Also known as: Sumo, Silverwave

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

36mm

Case Thickness

10.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

130m

Dial Color

Burgundy

Jewels

22j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1969

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