[Ron Ramirez]

What year by chance?

Fall of 1931.

http://www.philcoradio.com/gallery/1931c.htm#a

The first production models uses 70 cabinets with front panels cut and drilled to accept the 50 chassis. Soon after, production began on the more common 50 cabinet.

http://www.philcoradio.com/gallery/1931c.htm#b

There doesn't seem to be a lot of 50 sets in the 70 cabinet. The first time I saw one, I thought some collector had taken liberties with a 70 cabinet and a 50 chassis.

...and then I saw another, and then another...enough to convince me that this was a legitimate (if short-lived) factory issue.