Ralf, I was online looking for more Compo Heads. These were made by the Asashi Chemical Cloth Company years ago. They came in ( as I remember ) 3 different series,with each series having different weight classes. ( Don't quote me on this ) I have a set with the letters ( model no. ) printed on the heads as N3RC 12, N3RC 14, N3RC 18 . 12 tom, 14 tom or snare batter, and 18 bass drum. I was told that the N series was the Natural series.Their version of the calf skin sound. And the no. 3 was theeir medium weight. Also I have a 16" head labeled A2RC16. Same texture on top as the others ( I'm not sure exactly what it is ) but on the bottom of the 16 it has a thin kevlar weave just like some of the Remo marching heads. The last on is a 14" head labeled K4RC . I bought 3 of these still wrapped in the original package with a card describing these as best suited for rock. I would love to have some of these in a thinner weight. Some people hated them, some wished they had never gotten rid of them.I guess it all depends on what your ear wants to hear. I think I purchased the first three I mentioned in the 80's brand new. Played them for awhile and then gave them away. About four years ago my friend gave them back. I put them on my just purchased Camco set and did a jazz studio date. KILLER sound. So I took them, off just to see what they would sound like on my Ludwig toms. SUPER KILLER. But they only sound good if I really crank then up. I'm not sure if this is because they are so worn and old. But they sound really good. What writing is on the one you have? Larry