Seiko Cal. 6637 - 893

Released in 1965, the Cal. 6637 with design code 893 was part of Seiko's domestic market collection. It features a Burgundy dial protected by a Sapphire crystal and offers 180m of water resistance. [seikata-wm-7dbc8cd49a46]

Also known as: Tuna, Bullhead

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

45mm

Case Thickness

9.3mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

180m

Dial Color

Burgundy

Jewels

27j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1965

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