Spanish S2 TV175 exhaust

Hi,
I wondered if anyone can shed any light on the identification number on the side of the exhaust I currently have on a Spanish S2 TV175. Which is stamped INNOCENTI SC21-IGM-2105 S. It also has Casa Lambretta marked on it. I had a right game getting it off as top bracket is bent where it has been bashed to get it on in the first place. Non of the fixing holes line up correctly when the box is pushed onto the manifold. Not happy to even try to put this back on. The end of the exhaust is shaped like a four leaf clover. Thanks for any help.
I wondered if anyone can shed any light on the identification number on the side of the exhaust I currently have on a Spanish S2 TV175. Which is stamped INNOCENTI SC21-IGM-2105 S. It also has Casa Lambretta marked on it. I had a right game getting it off as top bracket is bent where it has been bashed to get it on in the first place. Non of the fixing holes line up correctly when the box is pushed onto the manifold. Not happy to even try to put this back on. The end of the exhaust is shaped like a four leaf clover. Thanks for any help.