Well what's particularly odd is that it's not in a module IBM used to combine tubes and passive components into modules which could be easily replaced:

http://en.wikipedia.org/wiki/File:RoehreIBM_090325.jpg

However the IBM701 doesn't seem to have. It had modules modules just like in that picture. Therefore I believe it's an IBM 701 or a very close relative.

http://www-03.ibm.com/ibm/history/exhibits/701/701_141510.html