Hand stamped, essentially, for the perfect pitch. Imagine having to work in this factory all day long, every single day of your life.
Anyway, it's been a long time since I've heard a steel drum being played. There used to be a guy at 34th Street-Herald Square Subway station that played this inside, but I don't know what happened to him. The Subway acoustics make for a great place to listen to steel drums I think. Would love to hear that guy again.