This is the QSL card of Arcala radio, the biggest ham radio station in the world. I got it recently confirming our contacts in several bands and modes, mostly for QSO made during contests. Note that I never asked a QSL from them, but a big station is big in everything.
E51DXX – Rarotonga, Cook Isl. - Mauri, AG1LE is again active from Rarotonga, Cook Islands as E51DXX until December 29, 2017. QRV on HF bands. QSL via H/c.
4 hours ago