Excellent first flight cover with a lot going for it in terms of postal markings and franking.  First it is a first flight cover from High Point, NC, sent to Portland OR. It has a Philadelphia receiver on the back which fills the first flight leg. There is also a Chicago Air Mail postmark on the back which may explain the MISSENT mark on the front.  A Baker & Portland RPO mark on the front shows it is headed to Oregon and delivery. The type III Washington 3-cent stamp is a plate number single...8588. The 2-cent Omaha has a printer tab and there is a 1-cent Columbian and 1-cent Franklin added on for good measure.  The flight is 19N7.