Seiko Cal. 6637 - 819

Released in 1987, the Cal. 6637 with design code 819 was part of Seiko's domestic market collection. It features a Blue Sunburst dial protected by a Sapphire crystal and offers 170m of water resistance. [seikata-wm-dc5aa801a2f7]

Also known as: Emperor

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

41mm

Case Thickness

9.9mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1987

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