Radio Amateurs members of USKA Club Station, HB9A will be active with special call HB90A from Muri, Switzerland, celebrating 90 years anniversary of Union of Swiss Short Wave Radio Amateurs, USKA, 1 January - 31 December 2019.
They will operate on HF Bands.
QSL via buro.

HB90A Muri, Switzerland. USKA Club Station