This small radio is
conceptually similar to Radiomarelli mod. Alauda.
Looking at the pictures you can
see how the chassis and the speaker are similar to the ones of
Italian factory model.
The Bosch 402 has no power
transformer and the filaments of the valves are connected in series.
402 was manufactured in three editions, the radio you can see here
is the third edition.
First edition has the medium
waves only, the peculiarity edition 2 and 3 have is the ability to receive the old
Police broadcast frequencies.
In the rear panel there is a
lever switch that lets you choose between the standard broadcast band and Police band.