Great! Two more 21-CT-55 serial numbers can be added. Here's the ETF-based list of those known. It will be updated (along with the CT-100 list) by the time of the upcoming May convention.
http://www.earlytelevision.org/pdf/r...march-2011.pdf
Here's a link to the updated 21-CT-55 serial number list:
http://www.earlytelevision.org/rca_21ct55_sns.html
Thanks,
Pete