Hello Peter,
When I restored my Arnolt 3086 I found a supplier in the UK which stocked all types of correct rubber grommets for the early type of the windscreen wiper shafts. The grove in the grommet that seals against the body do have different angles depending on the windscreen angle. And there were different depths and lengthes....
I have the address somewhere so if you need it, please let me know.
Regards
Kenneth
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