Vintage NJ Health Dept. Tin Sign – No Shellfish Harvesting Advertising

A great looking heavy metal sign advertising "Do Not Havest Oysters  Mussels and Clams." From the Dept of Health State of NJ. A great looking sign to hang up with your oyster cans, restaurant or office.

This let you know the shellfish in this area is polluted and not fit for consumption. 

It looks to be from the late 1950's or early 1960's. It is one sided. Measures about 12 inches by 12 inches square. It is 17 inches from point to point on the diagonal.