German Beer stein from 1959

I purchased this stein in Heilbron, Germany in 1959 while stationed there. The picture on the stein is that of the town of Heilbron itself as you can see in the photos I've posted. I also included a photo of the bottom of the stein showing that it was made in Western Germany. It is in a-1 condition although I haven't cleaned the dust off it in many years and was afraid to do so. Somone who is a collector may want to clean it up the correct way. I ahve no idea what it is worth and would appreicate any information on its value.