This is a 1925 Advertising Cover from The Eureka Vacuum Cleaner Co. of Philadelphia, Pa and sent to Harleysville, Pa.  2 Postmarks  (1 1/2 hours apart) were put on the cover with a Scott #615 2 Cent Huguenot-Walloon-Tercentenary stamp. The cover was opened on the right side as shown.  Check the photos for more details.  If you have any questions, contact me. Full return privileges. Fast 1 day shipping.  Low opening bid.