USED - Burnet's "Non Stop" Roller Machinery Skates
 
These were made in Germany many years ago and resemble the design of the modern Borkey Express Skates.  They can clearly handle a lot of weight, although I cannot find supporting part numbers or literature.  There are (4) skates & (2) 360-Degree swivel tops.
 
*** HEAVY LOCAL PICK-UP ONLY!!!