Murphy Rocking Chair?

I have a smaller wooden rocker. I think it is for children. It has a label that say Murphy Chair Company on the left, and Detroit No. 307 Mich. on the right. It has a crest in the middle, black with white print. It is not upholstered. It is all wood. I am looking to find out when it was made, and how much it could be worth.

By Mar-Lene Allen from Auburn, IN