the seller probably harvested those couplings from vintage tomy trains.
Some of toy r us Imagrarium? trains also have removable magnetic couplings
Some of toy r us Imagrarium? trains also have removable magnetic couplings
My Trackmaster/Tomy/Plarail Photo Gallery Page (over 600+ photos and still under construction)
https://www.flickr.com/photos/183311600@N03/
https://www.flickr.com/photos/183311600@N03/