Ha! The high frequency horn and felt dust cover are missing, as can be seen through the grill cloth. Another interesting aspect of this system is the means of holding the fiberglass in place. See those perforated metal discs? These are Western Electric parts which had been used as rear vent covers on their cone speakers. Altec Lansing produced their versions of the W.E. drivers after 1950, but used only cloth for the rear vents. They must have received boxes of these metal discs from W.E. as they used them sporadically to hold fiberglass in place for several years.
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