1918-1919 label style (6 patents in 2 lines):
Letter code JX / JZ.
A mx: 77420 (label); 4-X-33 (i.e., take 4; stamped under label); recorded New York, NY, October 8, 1917 (both take 2 and 4 were released).
B mx: 77426 (label); 2-Z-25 (i.e., take 2; stamped under label); recorded New York, NY, October 9, 1917 (take 2).