Philips electronics components group was the name given to the products marketed in America after Philips bought the American valve manufacturer Sylvania in the early 1980’s. Sylvania was a major manufacturer of valves and Philips bought them to get the lucrative American Government and military contracts. These valves are of the highest military grade which offer outstanding performance and were all made in the USA. The Philips 5687WB is a military-grade JAN specification double triode in improved WB version.
*Made In USA
*These tubes were selected by Kondo-San of Kondo (Japan)