http://www.musical-instruments-for-all.com/203299/rare-vintage-rca/rare-pair-vintage-rca-mi-12241-tube-microphone-preamps-2.html YEARLY 2016-10-16 1 http://www.musical-instruments-for-all.com/203182/rare-vintage-rca/rare-vintage-rca-mi-12241-tube-microphone-preamp.html YEARLY 2016-10-09 1