There was no number etched into the bottom ring. On a real U87, the serial number is usually stamped onto a small plate or etched into the metal on the body or the ring, depending on the era. But even as he thought it, Elias paused. He knew his history. He knew that in the late 70s and early 80s, during the transition from the U87 to the U87Ai, things got weird. Sometimes numbers were on the badge. Sometimes they were on the circuit board inside.
If you are checking a serial number because you suspect a fake, look for these visual cues: Product Registration - Neumann check neumann serial number
"It’s a steal," the kid across the counter said. He was shifting his weight, eyes darting toward the door. "My uncle passed away. He was a big audio guy. I just need the cash." There was no number etched into the bottom ring
: Send your serial number along with high-quality photos of the microphone (including the internal circuit board and capsule) to Neumann customer support. They can often verify the authenticity and provide a manufacture or shipping date within a few days. He knew his history