Coalport vintage teacup & saucer delamere pattern blue bone China rare

This is a very sought after and rare teacup and saucer. Very unusual blue pattern and no chips no cracks to this fine bone China. It is a white and blue with gold trim pattern. However, the teacup due to its age has discolored the white inside and on the exterior of the cup has a discoloration due to the age of the teacup and saucer.