1947 Plate Block Airmail Stamps 10 c Pan-American Building Union - Washington DC

Up for sale is a 1947 airmail plate block that is mint / never hinged.  It's the 10 cent stamp of a plane flying over the Pan-American Building Union in Washington D.C.

*Please note that my shipping time is up to 5 business days as I have multiple jobs and can only ship one day a week.  If you happen to purchase after I return from the post office on shipping day it will be a full week wait until I am able to ship again.  But most people will have a much shorter wait and some will have very fast shipping.  No one will have to wait more than 5 business days.  Thank you for understanding.