Seiko Cal. 6638 - 163

Seiko 6638-163

The 6638-163 is a sought-after Solar piece from Seiko's golden era. Powered by the 6638 caliber with 19j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-63e9162554ad]

Also known as: Silverwave, Baby Tuna

Specifications

Movement
Solar
Case Material
Two-Tone
Case Width
41mm
Case Thickness
8.7mm
Lug Width
19mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
160m
Dial Color
Black
Jewels
19j
Frequency
36,000 bph
Power Reserve
51 hours
Year
1977

Related Models

seikata-wm-63e9162554ad