It is possible that some misguided soul thought that it was a good idea to spray the segment with 'Waxoyl' (a paraffin wax-based anti-rust coating that is fine for garden tools before you put them away for the winter but not the thing to use on typewriters)  'Waxoyl'  is probably available in other countries, but maybe under a different trade name.  It you cannot free the typebars any other way, take them out and soak them in petrol (gasoline), then scrub them.  Clean the segment slots with petrol or acetone, making absolutely certain that it doesn't reach any plastic parts, then reassemble and lubricate very sparingly with sewing machine oil.  See if that works.

That is an awful shame about Cambridge Typewriter closing down.  I met Tom Furrier when he was in London some years ago and not only was he highly skilled, he was a really nice man.  I hope that he has a long and happy retirement.

Oh my goodness they were awful.  They had to have so many factory retrospective modifications that they had to re-launch the machine as the SGE65.  Dealers in England refused to sell them because they were so much trouble.  They insisted on having the SGE50.  But Olympia had sold the tooling for the SGE50 to East Germany.  So they had to go cap in hand to the East Germans to manufacture the SGE50 for them.  The clever East Germans said, 'Of course !  But we will not unless you take a load of East German portable typewriters too !'  So poor old Olympia had to have a load or Erikas, which were re-branded as the Olympia Regina.  My first typewriter course was on the SGE60/65 and I needed it.  The Olympia dealer that I was working for was making a fortune in fitting retrospective modifications to these in the field, and charging Olympia for the privilege.  Most went to British government offices.  I'll bet that Olympia regretted selling them !

If you are in Sweden, probably the nearest that could re-rubber your platen (assuming that you are competent to remove it and re-fit it afterwards) would be AKB Longs in The Netherlands.  If you e-mail them, they do speak good English.  Why not put your location on your profile ?  It is always helpful to know where other members live !

I got an e-mail about this from the organisers of the website.  They want to charge a subscription to be able to view it.  Most of the info that they present is available for free on other websites, so why pay ?