porcelain agricultural poultry sign

I have 2 antique porcelain signs that I would like to have appraised.   The dimensions of the signs are 6'x4'x 1".   The signs are in very good condition.   The pictures show some shadows, but the actual signs do not have any dark spots on them.   The signs were created around the 1950's.  Both signs are double sided and porcelain paint.   I hope someone can appraise these signs for me.