Two single weight airmail covers to Germany, sent in February and November 1969. Franked with combinations of 1968 and 1969 commemoratve issues, overpaying the 15c rate by 1c. The cover with th 6c Curling issue has the stamp on the scarcer dull paper.
Est $10.
To gain a better understanding of what I consider in valuing covers, you might find it useful to read the blog post here.
