Assumptions: I'm not very knowledgeable about microphones, so I don't know the details. --- The sponge inside the grille was quite deteriorated, so I replaced it! A standard dynamic microphone. This is a valuable USA-made Shure SM58. Among them, the early ones have a Porsche logo and the sound quality is significantly different from the current models. I recently received two of these from someone, and this is one of them. Since I, a laid-back, solo guitarist, probably won't be able to use it, I'd love for someone who appreciates it to have it. It seems it was purchased from a well-known used shop where the operation was confirmed. Just in case, I did a simple recording test in my environment, and it recorded without any noise. - SM58 body - Microphone case (handle = TALON, white lining) Weight is around 295g? It's from around 1980, and it's very valuable, and I think the condition is quite good for its age. Please understand that this is an old item and does not guarantee perfect operation.