That is a perfectly normal dateless off-center strike error. When this coin was struck, the collar was not in position so the planchet was not aligned with the dies. The collar is essentially a steel plate with a hole and it is positioned between the two dies. The collar defines the diameter of a coin and applies the reeding, it is also known as "the third die". Your dime is ~70% off-center and would be worth $5-10 with dated examples bringing a bit more.