Woauw! Did Realistic make this model C35 too?
Yes, It's
Realistic Modulaire 2250 You can see video
HERE (not my video)
There is one big difference - this model
2250 have 4 track high speed recording.
You can record 2 sides of 60 min cassette for only 15 min!
My
C35 have 2 track speed recording (standard feature).
About your question for
Sanyo M 9819-2K:
Radios manufactured for use in the world wide have a switch
for 110-120-220 volts on
the back side or in
the battery compartment.
Radios manufactured for use in Japan work only on 110 volts
Radios manufactured for use in USA work only on 120 volts.
Radios manufactured for use in Europe work only on 220-230 volts.
For more info see
HERE
Check at the battery compartment, remove speakers and check from all sides of radio, maybe have hidden switch.
If thereis no switch and you want to use it on different voltage, you must open radio and change the power transformer with similar.
Usually,
Realistic Modulaire 800 was made for USA and work only on 120v, but I see that your model work on 220V?!?