1968 DDO-005, 5-O-II-E Not to sure, its alot harder than wht it looks like.. but that's my best guess
It is Really ? Wow my first actual find.. thank you.. As for value I'm not sure but I dont think is that much... I'm more excited that after all this posting i actually found one.....
My comment is, Yes it is hard to identify coins like these. Most DDO- coins that can't be seen without a loupe are not valuable.