Here is a better pic. If someone has a model number list I guess it would be easy to figure out. the model number for this one is M2250R with chassis number 19M21. And my other zenith which I believe is a 53 is model number R1800E with chassis 19r20.
What's funny about the one pictured here is that it says vhf and uhf yet it only has Vhf.
If you go to
http://www.tvhistory.tv/1950-59-ZENITH.htm
The first one listed for 53 is alot like the one I have except the base is a little different. And the one listed last for 54 looks pretty close to the one pictured here.