Thanks. I should really have been able to find that date myself.
I've checked the EDVR many times before, but when I add my very first Victor record, I forget!!
This site (http://victor.library.ucsb.edu/index.php/object/detail/12025/Victor_17515) shows February 1914 as the release date, but the sessions were in 1913. This would be one of the first batwing releases, as the first initial ones had the word VICTOR on the side on the gramophone in drawing.