Marking on rear of case: Bulova, 10K Gold Filled, L1, 0156175
Marking on movement: Bulova Watch Co., 6AK, 21 Jewels, U.S.A.
Look as Academy Award "H"

I noticed it too Ken, Definitely a replacement on the dial - closer inspection shows wear on the dial from the original case it was in. I think I see the triangle on the mvnt as well.
My belief is that we're ID'ing cases. In out comments we have noted a couple discrepancies. I'm still inclined to tag it as an Academy Award.
Panel Members, your thoughts?
In reply to Panel Members, your thoughts? by Geoff Baker
due to the fact that the variant is not clear inclined would sign as AA without variant options
AA.
Agreed, generic Bulova Academy Award for now until we get a clearer advert. The 'H' variant looks to have a chord band.
1951 AA, no variant
1951 AA no variant