I recently completed a transaction to acquire my 5th Kennedy POTUS special Government medal. Only 295 left to go...(just kidding).  The  White House Office procured these medals from the U.S. Mint in Philadelphia for President Kennedy's use. Several have provenance (documented and completed chain of ownership) from President Kennedy to my collection. I believed I discussed the subject of provenance vs. pedigree in my previous blogs....

Large medals (48mm diameter and 4mm thickness) that were struck for the Centennial Celebration of the US Patent Office.  The copper specimen is a pattern. The aluminum specimen was issued at the 1891 celebration event. Most aluminum specimens are holed in order to wear as a badge of honor.I originally purchased the aluminum specimen and performed my research (see image of the booklet pages). There is a snippet that describes the aluminum medal as an event souvenir. The designer initials 'CLC' on the obverse stands for C. L. Chapelle.The copper specimen was purchased at a later date and I found a similar specimen in the Smithsonian National Museum of American History  provided a wealth of information about this medal (ID 1981.0296.1608). The manufacturer was Scovill Manufacturing Company. Click to view the Smithsonian pageThe current logo of the United States Patent and Trademark Office removed several of the design elements (i.e. cog wheel, etc...), but have kept the eagle and shield. 

I recently purchased this presentation set from an individual in France. 

This is 1 of 30 known Official Hawai'i Statehood Medal Progression Sets (source: Hawaii Money Standard Catalog Second Edition by Medcalf & Russell).