I had the same with my old Gazelle track that had been a roller derby biek. Hamfisted seat up and down mangled out the seat collar.
Probably the same story here. Both the stem and seatpost were well greased and scratched - hallmarks of a rental bike
@Rodolfo started
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I had the same with my old Gazelle track that had been a roller derby biek. Hamfisted seat up and down mangled out the seat collar.