I had something similar once and when I got the Extract it confirmed the watch was a DD145.022 - so probably the bicolore dial and hands were replaced somewhen to make it appear as a regular Moonwatch
I believe the probability of having a DD converted into a Moonwatch is higher than having a regular Moonwatch with a caseback swapped with a DD
DD’s were produced from 1982 on, so it can well be a birth watch. If so, I have a correct dial for you. You can still order the DD bezel from Omega. The challenge will be the hands...
Get yourself an extract ! ...eeek, you can’t at the moment
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