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I don't believe that's an H3a in Rhino's photo…,

Posted by Lew on April 2, 2015 at 08:52:21:
but of course I could be wrong. I once owned the model shown by Rhinofi. It is a much earlier amplifier, probably built in the 50s or early 60s that was produced under the "Harvard Electronics" label, when Futterman was more "in business". I think it was rated at 30 or so Watts per channel and was not in the "H3" series. But Rhinofi may be able to prove me wrong by showing a photo with the model number on the chassis. The H3s were all monoblocks, for one thing.
EDIT. The internet is a wonderful thing sometimes. I did a quick search and found two facts to modify my post: (1) I am incorrect, not all H3 series amplifiers were monoblocks, and (2) I was correct, the amp in your photo is not an H3a; it is an H3.