Thanks for posting this. Those are all beautiful pictures! That Low-Martin Mansion is amazing I am sure.

As for the original listing for the Kelvinator icebox; that is a gutted cabinet for an electric refrigerator. The two doors at the bottom, with the louvers, would have housed a belt-driven sulphur dioxide condensing unit.  The evaporator would have hung from the interior top of the cabinet; inside the upper left door. You can still see the mounting points on the top, plus the opening in the back wall for the lines to go from the inside of the cabinet to the bottom. 

Kelvinator was one of the original pioneers in mechanical refrigeration. They did not sell iceboxes.  They did, however, sell conversion equipment to install an electric refrigeration system, as a retrofit, into an icebox. You see different badging on those. They will have a maker's badge from the icebox manufacturer, plus another one for Kelvinator. I believe they say "Cooled by Kelvinator Electric Refrigeration."  On the one in the auction, it is the Kelvinator nameplate from a Kelvinator cabinet which would have come with its own cooling unit. 

The pictures attached are from a late 1920's smaller Kelvinator. It has the same emblem on it, along with its electric cooling system. The mechanical parts of the large Kelvinator would have been bigger, but would have more than likely looked similar to this one.

Sincerely,

David