UB4CYB

front side QSL card, of UB4CYB to IK6BAK, August 9, 1988, CW
rear side QSL card, of UB4CYB to IK6BAK, August 9, 1988, CW
letter envelope QSL card, of UB4CYB to IK6BAK, August 9, 1988, CW