Thanks to François F8DVD, we can show today an envelope with a rare Chapel of the Snow “cachet” from McMurdo Station (WAP USA-22)
Philatelists and collectors already know the common terms of the hobby, but refreshing the memory is never a waste of time!
Chachet
In philately, a cachet is a printed or stamped design or inscription, other than a cancellation or pre-printed postage, on an envelope, postcard, or postal card to commemorate a postal or philatelic event. There are official and private (independent of postal authorities) cachets.
Cover:
A philatelic cover is an envelope prepared with a stamp(s) and address and sent through the mail delivery system for the purpose of creating a collectible item.
Antarctic theme stamps and cachets forming a lovely collection. Antarctic covers of Antarctic Bases and Polar ships has normally a lovely cachet and many are signed by the ship masters or Base commanders and franked with a diverse selection of worldwide stamps. Covers cancelled on ship or at Antarctic base are always precious items for collectors.
Postmark
Postmark is an official mark stamped on a letter or other postal package, giving the place, date, and time of posting, and serving to cancel the postage stamp.