Thank you Choonjong! The first Goguryeo series from 2005 features a sword on the top stamp. Where was it found?
Thank you Choonjong! This is the second set from 2006. It was a vast empire with its capital in modern day China. The Tomb of the General is on the top stamp, built in the 5th cent. CE and looted so no artifacts remain. The stamp has a nice aerial view of some of the 100s other similar pyramid tombs.