Heres a random forum with a picture:
Second post with picture, trying to link it directly somehow goes to a reddit post.
But yes, eventually tech was good enough they could do it with mesh. Before that they were solid metal.
Like I said, this look like an old one.
But you should really try asking questions instead of just confidentally being wrong and waiting to be corrected. I tend to block people like that pretty quickly, and so do other people who take the time to explain things.