As I read from cancel, it is Port Lockroy Post Office, which produced this clear cancel on British Antarctic Territory (BAT as better known in "Philatelic" language), postage stamp.
Happy to see, that cancel is actually applied on stamp, so we (collectors) have this nice feeling to know that, YEAH, there are humans there! Personally, I hate "industry" made tourist items, in form of post card with imprinted cancel on it.
On same side of post card, near post office cancel, are another cancel, with penguin as central figure, and with coordinates of same Port Lockroy, than third cancel for Antarctic Heritage Trust.
Stamp used for postage come from 2014 year set of 5 stamps, for Airmail Postcard
(65 p face value). Stamp is produced in small format, so you will need lenses to see the beauty of design.

Stamp used on this post card, actually don't have "great" market value (around 1.50 US$ in mint or used condition), but full set of five stamps, can reach near 8.00 US$, on some online sites, and as on
ebay, I see that people are offering it for near 12.00 US$ plus postage.
