This name was used on a few different radios over the years, physically they bear little resemblence to each other although they are all 5-valve broadcast band mantle radios.
Intermediate Frequency: 455kc/s
Frequency Bands: 1
Chassis Notes(most schematics can be clicked to download a full size version)
At least 2 chassis variants - one of which has Philips(?) style IF cans, a miniature valve in the lineup, a different tuning cap (and reversed dial) and other differences like the orientation of the tone switch - probably one set built for HMV by Philips NZ while the other (main version) is Collier & Beale. Both sighted models have 'Manufactured by H.M.V. (NZ) Ltd'.
Service information (HMV_495BC_Little_Nipper_-_5V_BC_AC_-_1949.pdf) here