Pierron Pottery Co., Milwaukee Wis. Advertising Bowl

Question: 

I have a broken 4″ sponge band bowl. This bowl was in mint condition until my parrot flew by and fell to the floor.  I need to know the value of my bowl for insurance purposes. 

Thank you, Lorie

Answer: That advertising is quite rare and Red Wing stoneware collectors in the Milwaukee area would die to get there hands on this bowl. The value is $600  al