Yes you are correct, Willie Manson collaborated with JD on two series of limited edition weights that were called the Strathearn series - I think there were around 8 weights in each series and sold around 2005/2006 . They carried both JD and WM sig canes. Attached are pictures of a couple of the weights.
However JD has used lampwork from many sources at other times but the weights have always appeared with just the JD cane. Willie Manson, Allan Scott, Dunc Smith and Rosette Fleming are some who have produced lampwork for JD that has been incorporated into
weights signed with just a JD cane.