I have a Signal Corps, US Army CU-45/MRQ-2 Antenna Coupling Unit. Made by B&W Ser# 52 It looks similar to the TN-339 that just sold on e-pay. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=1385346203 Was the CU-45/MRQ-2 also for the BC610 and/or T368? Regards, Bob Mattson...W2AMI