Large Harris Worldwide Stamp folder with all countries from Oman to Poland.  Historical periods include earliest stamps to late 1990s or even 2010s for some countries.  A third to a half of the approx. 500 pages are populated - most of the later dated supplement pages are empty.  Dozens of blank pages have been added and populated. There are approx. 3500 stamps in the album and the vast majority are mint hinged.  Canceled stamps are mostly found in pages from the late 1800s to early-mid 1900s.   Found at an estate sale - hasn't been picked through - I'm not a collector.