BMW K100RT Motorcycle Lapel PIN Gold tone Double post
 
          1984 in Europe, 1985 in USA  : the flying brick.
Just came across these.     Very solid as one can see in the pictures.
Marked ballou on pin retainers. 

If near Maynard,MA (West of Boston,) feel free to pick it up
In person at my shop; DuncansBeemers.
Mufflers, Fairings, Fenders, Tires & Rims, Windscreens, Etc...
Many saddlebags in Stock (except /2 enduro)
& thousands of other new & used parts.
Thanks for browsing.