Roy Duffy remained a visitor. As agricultural equipment changed and older models disappeared from regular parts support, he began sending customers to the Kessler shop when a suitable repair might keep an otherwise useful machine in service. On one visit he brought a particularly difficult casting and stood with Jonah examining it under the light. When Jonah declined the work because of the damaged load-bearing area, Roy nodded and said that was exactly why he trusted the shop with his customers.
Big Earl kept his separate pile at the salvage yard. He occasionally telephoned Jonah when a casting arrived with an unusual failure, and he learned enough over the years to distinguish a useful teaching sample from ordinary scrap without pretending to be a mechanic. A small wooden sign appeared above the covered section behind the office, written in Earl's uneven block letters: KESSLER MATERIAL. Whenever Jonah saw it, he remembered the older man's laugh on that freezing January morning and felt no need to mention the difference.
Inside the repair shop, the first failed casting remained on a shelf above the main workbench. It was not polished or displayed with a plaque, and anyone unfamiliar with the story could easily mistake it for something left there while waiting to be thrown away. The repaired section still showed where Jonah had stopped following the fracture too early, and the small extension of the crack remained visible beyond it. He kept the piece precisely because it refused to flatter him.
The wall of engine blocks changed over time. Some were cut open to reveal internal structure; others became practice specimens for studying different failures, and a few were eventually sent back into the scrap stream after they had taught everything Jonah could reasonably learn from them. One block remained almost exactly as he had collected it from Earl's yard. Its dark fracture crossed one side under a patch of old paint, and the underside still carried a faded salvage-yard mark from the winter of 1989.
Silas liked that particular block. When he saw Jonah studying it, he would sometimes ask what lesson it had taught him, and the answer changed a little as the years passed. At first Jonah said it taught him how far a crack could travel. Later he said it taught him the value of practice, then the importance of knowing when to stop. Eventually he told his grandfather it reminded him that something could look finished to one person and still have value to another.