I was working at a sawmill troubleshooting some equipment. I opened the panel and a schematic of the controls had been hand drawn and left in the cabinet. AS I looked closer, they were signed and dated, and the handwriting looked familiar. I realized they were drawn by my father over 35 years before this incident when he had installed the equipment.
What a coincidence. Did he sign his work?
Where I worked before retiring, I used to do a lot of custom motor control wiring. I always made sure that I pasted a hand drawn wiring diagram/schematic inside the cabinet doors. Sometimes I even had them laminated in plastic so the dampness wouldn't get at them. I never signed them though.