Blue delft dutch spoon set of 6

My grandmother left me a set of mini spoons,i have some say they are pewter,and they have blue delft on a dutch wind mill looking scene on a button on top.my grandmother had them as long as i can remember,im 30 yrs old,my father said shes had them as long as he can remember and hes 69 yrs old.she passed away at 88 yrs old,and she had told me,she inherited them, Ive been madly searching online to try to find them and i cannot. Im curious to what they are called,where there from,maybe a price? Thank you so much