A group of 6 mostly all addressed FDC's franked with the 1958 Geophysical Year issue ad the 1961 Colombo Plan and Resources for Tomorrow issues. The Colombo Plan issue is represented by four different cachets, including a Caneco. Very minor corner wear and slight age toning, but generally clean and fine.
Unitrade cat. $18 for unaddressed covers, but the non-Rosecraft cachets compensate for the addresses. Est. $15+.
