Seiko Cal. 6638 - 550

Seiko 6638-550

The 6638-550 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Cream dial protected by a Sapphire crystal and offers 130m of water resistance. [seikata-wm-59eacd465b4a]

Also known as: Turtle

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
36mm
Case Thickness
9.6mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
130m
Dial Color
Cream
Jewels
33j
Frequency
21,600 bph
Power Reserve
56 hours
Year
1970

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