unknown mountains on postage stamps
Korea North 1966, unknown (called Ju-ul ?)
Korea North 1967, Sambang Falls.
Korea North 1975, (mine) unknown.
Thailand / North Korea 2015, Joint Issue
The stamps were issued in the series:
"40th Anniversary of Thailand - Democratic People's Republic of Korea Diplomatic Relations".
The Korean "White bellied kawk" stamp is shown as stamp on stamp in the series "70th Anniversary of the First Korean Postage Stamp", issued in the year 2016.