Seiko Cal. 6638 - 964

Seiko 6638-964

The 6638-964 is a sought-after Quartz piece from Seiko's golden era. With its 19mm lug width and 8.8mm profile, it sits comfortably on most wrists. [seikata-wm-7f71db016ea2]

Also known as: Panda, Bellmatic

Specifications

Movement
Quartz
Case Material
Hardlex-Coated Steel
Case Width
35mm
Case Thickness
8.8mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
90m
Dial Color
Navy
Jewels
30j
Frequency
21,600 bph
Power Reserve
52 hours
Year
1979

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