When I acquired my 925 85 it came with a slightly bent tip, I emailed them on the same day and they sent me a spare they had along with a handwritten note.
I’ve also seen a guy on Reddit that acquired a Marsmatic 700 drafting set (80s), the isograph pens had broken tips, he sent an email, they told him to ship it to them and tell them the cost of shipping so that they could repay him with items from their catalog, he said they didn’t have to do it but they still sent markers and pens after repairing the isograph pens (all free of charge, other than shipping).
They’ve also sent me detailed info on old pencils, scans of vintage catalogs… Best customer support I’ve ever dealt with.