At some time during World War II Exton apparently suffered a significant flood. The Valley Creek that runs along the road across from what was then The Exton Dairy Grill looks to have overflowed its banks. A Brandywine Farms truck navigates the waters along with two cars.
Before there was The Guernsey Cow billboard, during World War II, this sign pointed the way to The Exton Dairy Grill and proclaimed “Our Ice Cream for Health; War Bonds for Victory.”
The Guernsey Cow, Exton, Pennsylvania 
The sign reading “Our ice cream for health; War Bonds for Victory” is a classic American war-time sign. I hope the sign got preserved somewhere. If not, at least in this picture.