The Philips BZ146U was manufactured by Philips Electrical Industries of N.Z. Ltd in 1954.
4-valve broadcast band mantle radio.
Also sold as a Mullard model 454, and similar to the Philips BZ156U (released the following year).
Note: This is a series-string heater, transformerless, set which means the chassis has the possibility of being at mains voltage levels. If you don't know what you're doing then this set can be lethal. It is the authors view that sets of this nature should have the power cords removed and not be used for anything more than a decoration.
Valves (4): UCH42, UAF42, UL41, UY41
Intermediate Frequency: 455kc/s
Frequency Bands: 1
Chassis Notes(most schematics can be clicked to download a full size version)
WARNING: Transformerless set.
Service information (Philips_BZ146U_-_4V_BC_ACDC_-_1956.pdf) here