I like that seat. Where did it come from?
It's a Giuliari seat. They were an aftermarket part when our bikes were still fashionable
You still find one every now and then on Ebay, especially in Germany.
@ Ecosse & Broshi:
That's the light I meant! And they are cheap too. I'm used to paying shipping now, half the bike came from the US. I even got some parts from Japan
The pipes don't clear the sidestand on most 550's. You have to cut it iff and reweld it (haven't done that yet either as I can't weld)
here's how it looks with the Model-A tail llight, although I'm not sure if the size is correct..