The 1929 Western In Old Arizona, for which Warner Baxter won the Best Actor Oscar, was billed as “the first 100% all-talking drama filmed outdoors”.
What movie was billed as “the first 100% all-talking drama filmed outdoors”?

The 1929 Western In Old Arizona, for which Warner Baxter won the Best Actor Oscar, was billed as “the first 100% all-talking drama filmed outdoors”.