1931, attractive red corner card from stamp dealer & cachet maker W G CROSBY, along with black Exhibit ad from Long Beach Collectors Club, posted from Long Beach, CA Mar 22, 1931 to Rochelle Park, NJ, business size envelope, VF (Image)

Est. 40

1931, Wilkins-Ellsworth Trans-Arctic Submarine Expedition, from New York to Spitsbergen, Norway on clean cover, addr to NYC, imprinted with purple Submarine logo cachet at left and signed by Herbert Wilkins above the cachet, franked with both US May 8 & Norwegian Aug 18 stamps (Image)

Est. 75

1931, Wilkins-Ellsworth Trans-Arctic Submarine Expedition, from New York to London, England, on clean cover, corner crease UR, addr to Brooklyn, NY, with imprinted purple Submarine logo cachet at left and signature of Sir Hubert Wilkins written across center of cachet, also via Sir Hubert Wilkins submarine 'Nautilis' written on back, franked with both US & Great Britain stamps (Image)

Est. 75

Little America, Jan. 31, 1934, printed 3 line message at lower left...delayed for one year....., BS San Francisco, CA. Mar. 23, 1935 (Image)

Est. 40

Little America, Second Cancellation Mail & penguins cachet at left, pmked Jun. 30, 1935, BS San Francisco, CA. Mar. 25, 1935 (Image)

Est. 40

1941, The Snow Cruiser reaches the South Pole, cachet in black & red, posted from Boston May 6, pencil adr to Boston, "Registered No. 1733/ Carried from Little America by U.S.S. North Star" on reverse (Image)

Est. 30

1975, Cleveland Zoo, special cancel Mar 2 1975, with three different locals, cancelled by elephant cancel, carried by Siberian Husky sled dogs, blue cachet honoring BALTO, lead sled dog which delivered diptheria serum from Anchorage to Nome, Alaska in 1927, 4-panel card enclosed expanding the history of this sled dog and the event (Image)

Est. 20