IZ6BTN

front side QSL card, of IZ6BTN to IK6JOV, December 28, 2013, CW
rear side QSL card, of IZ6BTN to IK6JOV, December 28, 2013, CW
letter envelope QSL card, of IZ6BTN to IK6JOV, December 28, 2013, CW