1949 Wright Brothers Airmail Single 6c Postage Stamp - Sc C45 - MNH, OG - CW400b
1969 John Wesley Powell - 1869 Expedition - Single 6c Postage Stamp - Sc# 1374 - MNH,OG
1969 John Wesley Powell Plate Block Of 4 6c Postage Stamps - MNH, OG -Sc# 1374 - CX359
1949 Wright Bros Airmail Block Of 4 6c Postage Stamps - Sc# C45 - MNH - CW400c
