Seiko Cal. 6637 - 196

The 6637-196 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Burgundy dial protected by a Sapphire crystal and offers 30m of water resistance. [seikata-wm-991bd0748aac]

Also known as: Baby Tuna, Arnie

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

12.3mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

30m

Dial Color

Burgundy

Jewels

32j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1976

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