1935, Little America, cachet features Admiral R E Byrd, reverse features penguins & 2nd cancellation mail cachet (Image)

Est. US$30.00

1935, Little America, Antarctica, Admiral Richard E. Byrd portait cachet on business size cover, franked with 3¢ #733 & #735 singles, with additional penguin 2nd Cancellation Mail chachet on reverse, minor stain lower right, small corner crease, o/w sound (Image)

Est. US$50.00

1937, blue cachet in commemoration of the birth of General Philip Kearny & in commemoration of Dr. Alexander Graham Bell, posted from Kearny, NJ Jun 2, 1937 (Image)

Est. US$15.00