No, not a Conti. Apart from the missing Conti stamp, it's also the wrong part number.
Contis are 0755.84.105 (left) and 0755.84.100 (right)
It's a mystery to me. I've never seen a Ducati part number with 0977.xx.xxx prefix before. I don't think I've ever seen a muffler number higher than 08xx any bevel model. The singles tend to be in the 04xx to 06xx range. Most of the bevel twins are in the 075x range although there are a couple of 06xx and 08xx outliers.
You can search Ducati part numbers here
https://www.ducatiomaha.com/search (numbers only - leave out dots, dashes, etc.)
But I already tried 097784503 and it couldn't find anything.
Same negative result with a part number search on the Stein Dinse website and Google. It's got me stumped.
The only hint I can come up with is that the part number prefix tends to get higher with later models, so I'm guessing it's from something later than the bevel engines. Maybe an early belt drive bike? The later "modern era" Ducatis have a different part number configuration.
Another possibility (given the "MADE IN SPAIN" stamp) is that it's from a Mototrans bike. Spanish company Mototrans produced some Ducatis under licence up to around the mid 1980's, but I think they were pretty much single cylinder bikes only. If it's anything to do with Mototrans, good luck finding parts numbers. Online records are like hens' teeth.
