Bela Lugosi completed his scenes in March 1931, after "Women of All Nations" and before "The Black Camel."
In September 1928, Warner Bros. Pictures purchased a majority interestin First National Pictures and from that point on, all "First National" productions were actually made under Warner Bros. control, even though the two companies continued to retain separate identities until the mid-1930's, after which time "A Warner Bros.-First National Picture" was often used.
Vitaphone production reels #4826-4832 and #4807 (trailer)