A1: recorded 1930. Mx.W404408B. New Rhythm Style Series no.53.
B1: Frankie Trumbauer And His Orchestra recorded Sept. 8,1930. Mx.W404434B. New Rhythm Style Series no.54.
1930 ! Not 1931 !
Please correct the date.
According to the late Eddie Shaw's D.A.T.E.S. numbers up to R.874 were issued in 1930. As you can see already stated, both sides recorded in 1930 (which is possibly the more relevant).