I was hoping you may be able to tell me which microphone model used the element identified as "Controlled Magnetic Transducer" Model 99N556. The element is also marked as Manufactured In Mexico. I was wondering if you'd also know the vintage. I'm guessing they may be relatively recent, possibly for a 520 series mic?
The 99N556 element was last made in 1994. It was an OEM element made for another manufacturer. It was not used in any microphone product that carried the Shure brand.