Mehdi F5PFP says:
The only official qsl manager of the callsigns assigned to
the Argentine antarctic bases like LU1ZS is LU4DXU
(not lu2cn who doesn’t qsl anymore).

LU1ZA Orcadas,LU1ZAB Matienzo,LU1ZB Melchior,
LU1ZC Decepcion,LU1ZD San Martin,LU2ZD Primavera,
LU1ZG Belgrano II,LU1ZI Jubany,LU1ZR Petrel,
LU1ZS Camara,LU4ZS Marambio,LU1ZV Esperanza

All these cards have been supported by the Antarctic Challenge
program and can be viewed in music below.
http://www.french-polar-team.fr/QSL_supported.php

73 Mehdi F5PFP