This is one I have never encountered before. 10K white gold filled with "X" shadow dial bearing yellow gold numerals and hands. We have so far documented this case for the Academy Award "Q" in yellow gold with "X" dial, the AA "T" in yellow with curtain dial and AA "V" in white w/curtain dial.
It appears this combination is a first for the database. My first inclination was that it was a put together, but then I found another on Lisa's site that is identical and apparently mis-identified as a AA"Q". Based on the curtain dial models, I have to believe this one is legit and had a specific variant letter.
Band was added by me. I received the watch on replacement leather. Running and keeping time.
Period ads (in color) Show this model in yellow as the Academy Award "Q" and none make mention of "also available in white". I found one ad from the Billings Gazette dated 1953 showing what appears to be the same watch depiction advertised as the AA"C". The "C" variant has to this point been associated with a women's watch. I have no idea if the ad is correct but thought I would mention it.
1951 (movement and case dated L1) Academy Award