[jmanley1]

I was lucky enough to find a brand new, never used, pair of these recently.  They are the model from the early 1980's.  They come with the full size plug, not the 3.5 mm.
 
Question, on eBay I have seen the 3.5 mm replacement plug for the HD414.  Will that plug fit my particular model of HD414 from the early 1980's?
 
Thanks!