Welcome to the Forum!!! Cool! Ya, they can be pretty valuable. Post a picture so some of the members can try to grade them! Where did you find them? SM
Please post some photos....they might be fake...I'm not going to sugar coat it...there are a lot of fake 1916-D dimes out there...it would be worth it to have it graded by one of the top 4. PCGS NGC ANACS ICG PCI might be ok but that would be my last pick. Speedy