Jameco has these National Semiconductor NSA1166 7-segment 6-digit bubble displays and I bought a couple to distract me from what I should be doing.
They are very simple to drive as each segment has its own pin that is driven high and each digit has a pin to act as the cathode. I plan to write my own driver but like everything these days, there is an Arduino library that I am using at the moment. It might make an interesting display for use with my milliohm meter project which is waiting patiently for me to return.
I tested one with my bench multimeter current limited to 3mA to start to make sure I knew which pins were which and then set it up with an Arduino MKR1010 and the SevSegPlus library.
It works! Behold the mighty '70s technology!