No, I used a normal contact mic through some additional effects

"The 25-minute opening piece is a suite of admiration, while the later, shorter pieces are like testimonies at a retirement party, offering different perspectives: the drone of “2,” the squeaky chorus of “3,” the cricket-like placidity of “4” and the haunted beeping of “5.”

"Enter the composer, sonic notebook in hand, eager to transcribe the stories of the engine, the carriage, the wheels. While much press is given to the loss of human languages and the cries of extinct creatures, little is given to the diminishing of specific industrial sounds."

Many thanks to Rosina Pencheva and Capturing Creativity who produced this project and made it happen.
Many thanks to Maya Ivanova for all the communication and help to spread the word about it.
Thanks to Autism Association for the partnership.
And of course thanks to Jakub Knera and The Quietus