The Philco model 521 was manufactured for Chas Begg & Co. Ltd by Dominion Radio and Electrical Corporation Ltd in 1952.
Bakelite 5-valve dual-wave radio. The model 501 is the broadcast-band only version.
Valves (5): 7S7, 7B7, 7C6, 7C5, 7Y4
Intermediate Frequency: 455kc/s
Frequency Bands: 2
Chassis Notes(most schematics can be clicked to download a full size version)
Service information (Philco_-_model_521_-_5V_DW_AC_-_1952_.pdf) here