Many thanks to Julio for this fantastic cover from Argentina. To match the exact postage he added a few more stamps on the back of the cover. In total the postage seems to be 6500 Argentine Pesos for this letter which is around 16-17 Euros. So a big thank you Julio for sending me this cover and also for adding some mint stamp with it.
Stamp:
Argentina in Antarctica (m/s) - Issued: 16-08-2022
Stamps:
11x Definitives - National Parks ($500) - Issued: 15-05-2022
1x Definitives - National Parks ($200) - Issued: 22-07-2019