When I was a kid, I had no clue about calibration. For sure, it held some dark fascination.
First Computer of mine was VIC-20 that I got on Christmas '83-- my first own photo camera was, same year I think, one Kodak Disk 4000 series.
First time that my dad let me drive on my own in his car was on a sunday morning at the Hewlett-Packard employee parking lot in Böblingen (Germany, I was around 12 or 13). My first calculator that I bought with my own money, quite expensive, was a HP 48G.
So -- I wonder, whatever happened to clock 5061A #3 -- has it ever been used to calibrate HP house clock in Boeblingen plant? Which I read has been the plant, at which HP introduced flex time around '67 first for their employees (I just learned). (IBM, HP, Mercedes had major operations in the town I grew up.)
I never really knew what HP was about, what they were doing at this plant, I have to admit-- I bet though, one still today would be able to calculate the influence of those flying HP clocks on world time. Not exciting enough?