I suspect the 1944 date was based on the A side's being on 20-1565, as part of a commemorative album set upon Mr. Miller's disappearing along the English Channel.
Besides the issue of whether or not the patent number 2130239 (held by RCA itself, regarding one of the compounds used to manufacture their records) was on the center label, there is also a distinguishing identifier as to which pressing came where by the way the label is shown. {Images #421026 & 421027} was pressed in Indianapolis, IN, whilst {Images #426672 & 426673} came from Hollywood, CA (notice how the print on Hollywood pressings seemed to be a little bit aligned lower than on Indianapolis pressings). There is a very interesting tutorial on this guide (in the years before RCA plants started putting the initials of each plant on their runout deadwax) right here.