I believe this is the direct successor to the HP 5061A. HP spun off Agilent, who sold the time/frequency product division to Symmetricom, who was then acquired

I believe this is the direct successor to the HP 5061A. HP spun off Agilent, who sold the time/frequency product division to Symmetricom, who was then acquired by Microsemi. It seems that the inflation-adjusted price of the Microsemi 5071A is about the same as the ~1970 catalog price of the HP 5061.