[Boatanchors] Beam question

[Glen Zook via Boatanchors]

There is an advertisement, on page 125 of the February 1959 issue of QST, that shows these traps. Glen, K9STH

Website: http://k9sth.net
      From: D C _Mac_ Macdonald <k2gkk at hotmail.com>
 To: K9STH Glen Zook <gzook at yahoo.com>; RAY FRIESS <rayfrijr at msn.com>; "boatanchors at mailman.qth.net" <boatanchors at mailman.qth.net>; D C _Mac_ Macdonald <k2gkk at hotmail.com> 
 Sent: Monday, May 25, 2015 12:48 PM
 Subject: RE: [Boatanchors] Beam question
   
#yiv3135567249 #yiv3135567249 --.yiv3135567249hmmessage P{margin:0px;padding:0px;}#yiv3135567249 body.yiv3135567249hmmessage{font-size:12pt;font-family:Calibri;}#yiv3135567249 Any idea as to approximate year range of those early Hy-Gain antennas?  I have ARRL Handbooks going back to 1957 or so.