If it is a CUD it's a minor one.. no big premium If it is a Lamination it's also minor with no big premium No much more than $2.00 - $3.00 and some here might say that is too much
I will say it's a Lamination Error. Which is caused by a defect in the planchet. A soak in Acetone before storage will do it good. 1939-d is a semi-key date for the late "30's", Nice find, I think these are fun because they can still be found.