Original stereo equipment vintage ad for AMERICAN ELITE INC.  Telefunken M-97 Portable Recorder.  You can put a strap on anything and call it portable.  But consider the size and weight.  Go to any high fidelity store and see several different tape recorders.   Before you heat them, walk around with each one.  Now, which one is really portable?
Main office was located at 48-50 34th Street, Long Island City, NY.
This unique old one page 1961 magazine advertisement would display beautifully matted and framed.  It would make a nice accompaniment to your vintage stereo.