I am offering a Vintage Osco Drug Store 25 Year Employee Service Award Gold Filled Lapel or Tie Pin with Tested Diamond.  This gold filled diamond pin is in good vintage condition with age appropriate wear.  The hallmark is very faint and I believe that it states 1/10 10K, indicating gold filled.  The diamond was tested using a Presidium Gem Tester II.  Please review the pictures attached as they are part of my description.  Thank you for looking!