While I can't tell from the photos which what it is, I wouldn't rule out a D/D west. It would, of course, be a very rare thing since there is a strong DDO
on the date for this year and so that area gets checked pretty much by everyone that looks for varieties and one hasn't been found some 35 years after the coins were minted. Not impossible, but would be a remarkable find.
Anyway, a true west D/D can be tough to determine. There is still some debate about whether the 1927-D DDO-003 has an RPM or just something that looks like one. People disagree and Wexler lists it as WRPM-005 while CONECA does not list it at all.
For comparison, the most similar actual RPM I know of is the 1953-D/D RPM-001. So here is an image of it just for something to maybe compare to.
Good luck and hoping for the best with your find.