The HMV 525D was manufactured for His Master's Voice (New Zealand) Ltd by Various in 1952.
5-valve dual wave mantle radio
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 (HMV_-_model_525D_Argyle_-_5V_DW_AC_-_1953.pdf) here