* Change 3 Part Black {2538 Boat Mast Section Top 16 H with 4 Stud Holes at Bottom, Undetermined Type to 2538a Boat Mast Section Top 16 H with 4 Stud Holes at Bottom, without Bottom Nubs}
* Change 1 Part Black {2537 Boat Mast Section Middle 13 2/3 H, Undetermined Type to 2537a Boat Mast Section Middle 13 2/3 H, Without Bottom Connector Prong}
Comments from Submitter:
determined with an orignal set (purchased in 1989)