Siamese pipe to fit a7 plunger, not certain but I think it'll fit rigid too. Came off a bike not touched for 30 odd years.
Had this on eBay, but made a listing mistake which I was unable to edit, and so ended the listing early.
As you can see from the photos, the main section of pipe has good chrome until the branch off, then it gets a bit scruffy although solid. Short section is also tatty but solid and could be rechromed if wanted. Comes with the bracket.
Open to offers !!