[OKDXA] Prefix Blocks Prior to WWII?

[Kim Elmore]

Here's an odd-ball question:

Does anyone know, or know where I might find out, what prefix blocks were 
used prior to WWII for Germany and the U.K.?

&3,

Kim Elmore, N5OP
                           Kim Elmore, Ph.D.
                        University of Oklahoma
         Cooperative Institute for Mesoscale Meteorological Studies
"All of weather is divided into three parts: Yes, No, and Maybe. The
greatest of these is Maybe" The original Latin appears to be garbled.