I put this on boatanchors but for got mil http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=400130469176 As to the 'maker' Boonton Research and not ARC. In a way it is ARC http://www.hparchive.com/Boonton/Boonton-New-Jersey.pdf Also looks like S/N 12 not 1 -pete Not Assoc with seller