The European radios of this era certainly differ from their North American counterparts in a number of ways. Essentially these Euro radios all look very similar except in detail. Electronically, they have their own set of nuances. From a performance standpoint, most of the manufacturers take special care in providing excellent sound quality, through the use of quality speaker systems (actually using woofers and tweeters in table models), and well designed tone control and audio feedback circuitry. The broadcast and short wave bands in particular are usually quite sensitive and selective.
From a servicing and restoration point of view, I commonly find very noisy pushbuttons, sticking or seized tuners, and I have found that most of the tubes are very weak and in need of replacement. Paper capacitor quality looks bad, but generally the resistors that were used were very stable and rarely need replacing.

This Germany-made radio came to me for repair, rather than full restoration. The complaint was “volume control does not change volume. Some reception, but very poor”
Right off the bat, I found all tubes to be very weak. The EL84 audio output was just marginal. These were all replaced, but still no audio.
Power supply voltages were checked and all was okay there. At this point I decided to do some signal tracing to find out which stages were working, from the audio output, back towards the front end.
This turned out to be a case of a botched-up previous “repair”. Some components had obviously been replaced before, (and with poor workmanship), but one audio coupling capacitor was connected to an incorrect location, so it was actually impossible for any audio to get to the output stage. Once the circuitry was wired properly according to the schematic, the radio came alive.
To complete the work to ensure some reliability, I replaced the power supply filter capacitors and the paper capacitors.

One other point to mention: of the six coils seen at the center of the top chassis view, 3 had broken loose. They were originally just glued to the top of the pushbutton phenolic plate. These were carefully re-glued with GC service cement.
All too often, these European radios have exposed coils like these, with very fine wiring exposed as well, and very prone to breakage if one is not careful working in close quarters to these.