1921. Surcharge. 8/12 Øre, olive (5) and Christian X. 20 Øre, brown (2). Very scarce airmail cover sent by the only air connection in 1922 to a foreign country.

Danish 1921 surcharge stamps: 8/12 Øre olive (5) and Christian X 20 Øre brown (2) on very scarce airmail cover sent by 1922's only air connection to foreign country.