Price is for two NOS tubes. Those Philips Miniwatt 4606 tubes were made by Philips tube company. Used in lots of DIY pre-amp project. Very hard to find. The sound is reported to be very ,very good.
The 4606 type is full equivalent with the STC 3A/141A (from UK), Western Electric 101D (from the US) and the R86 (France).
Tested STRONG as follow:
Ia = 9.0 mA
Ia = 8.2 mA
Test under: Uf = 4.5V, Ua = 130V, Ug = -9.0V
Where 100% is Ia = 8.5 mA
Shipping will be DHL or UPS Express Worldwide, except something else is agreed upon.