Victor made a number of models of record lathes/cutters that were portable and/or designed for home use.My guess is this is such a unit,that was either off the shelf or slightly modified. Here is one that sold on eBay recently  http://www.ebay.com/itm/Vintage-RCA-Victor-MI-12701-Lathe-Victrola-Record-Cutter-/171098700814 Looks a lot like it. A slightly later on demonstrated on YouTubehttp://www.youtube.com/watch?v=N3EiOXPNU2k This message board post mentions one from 1934.http://www.lathetrolls.net/viewtopic.php?f=2&t=4004 Roger > Date: Tue, 20 Aug 2013 19:06:39 -0400> From: [log in to unmask]> Subject: [ARSCLIST] Laura Boulton> To: [log in to unmask]> > My apologies for the last thread going out without a subject line; it> got away from me.> > Could knowledgeable persons take a look at the photograph at this link> and tell me what equipment (mike and cutter) Laura Boulton is using> here? I have an idea, but I've screwed up on identifying vintage mikes> before and do not want to put myself unwittingly in jeopardy:> > https://app.box.com/s/er6xidwh4vhv3zgmjr9c> > thanks,> > David N. Lewis> Cincinnati OH