I thought that there was a fire at Gettysburg in the late 70's that destroyed most of the ham radio licensing records. Was it in the mid 60's instead? Or, were the files before 1966 lost or not digitized?
It must've been a pain to digitize whatever records the FCC has left.
It was a flood, I believe caused by one of the hurricanes that hit the northeast. I'm not sure which one--maybe Agnes
in 1972. (Follow the link to see the rainfall that hit Gettysburg.) My guess is that archives in the basement were destroyed, but current records were okay.
As for digitizing, they really haven't done that for the old records. Nothing is really digitized (meaning computer-accessible) prior to the ULS era, which started around 1998.