Zenith also made un its with two tome arms:



On Dec 2, 2009, at 12:47 AM, Michael Biel wrote:

Steven C. Barr wrote:
> IIRC, GE put out some models which had two to play 78's  
> and one
> to play LP's...?!

No, it was Philco that did that, and it was in 1948.  The 78 arm was  
usable for the changer mechanism, but the LP arm was single-play  
only.  Rather a stupid idea, but they were in a hurry to get them  
out!  Philco had single-arm 2 speed changers by the end of 1948, just  
in time to have to re-design them into 3-speed changers.  I have all  
the catalog sheets and repair manuals for this whole series, and have  
a couple of unmounted examples.