Here's the possible DDO-001 I found:
No matching markers but doubling is very similar. Similar to yours in the notching on the Y but yours lacks the separation line on the right side.
I don't think we have the same DDO
, just showing that these 1975 DDOs aren't too visible on worn coins or LDS coins.
Yours may be a DDO
but I would like to see better pics or see it in=person.