That should be the Northrop Alpha 2 NC942Y, of the Northrop Aircraft Corporation. Is it
It certainly is!
It even says "Northrop Aircraft Corporation" on the side of the plane in the picture.
They flew with TWA: Transcontinental & Western Air, which later became know as Trans World Airlines. I was fascinated by the Wiki
which describes the service they had between San Francisco and New York that required 13 stops and took 23 hours.
If you've ever played the computer game, Medal Of Honor - Underground, you'll see one of these that gets sent to an airstrip in North Africa to rescue the hero at the end of a level.