Seiko Cal. 6638 - 919

Seiko 6638-919

The 6638-919 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6638 caliber with 21j jewels beating at 36,000 bph, it delivers a 70 hours power reserve. [seikata-wm-83b990f8b69c]

Also known as: Silverwave, Golden Tuna

Specifications

Movement
Quartz
Case Material
Hardlex-Coated Steel
Case Width
43mm
Case Thickness
11.2mm
Lug Width
20mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
30m
Dial Color
White
Jewels
21j
Frequency
36,000 bph
Power Reserve
70 hours
Year
1987

Related Models

seikata-wm-83b990f8b69c