Ever seen this tool?

[572Camaro]

It’s a pro-chek hi voltage ignition analyzer.
I bought it in the late 1970’s.
This tool is NONINTRUSIVE.
Just put the supplied headphones on!
I use it frequently for spark plug wires
It detects improper firing.., coil output
Especially regarding 5/7 crossfire on a Chevy.
It is a very simple tool.

Have you seen it before?

If so, where?

I need a new one

[raustinss]

you had me at probe ! lol

[sleepertime]

Is something like this a 21st century version?

https://www.amazon.com/General-Technologies-Corp-TA100-Tachometer/dp/B000RT9BH2/ref=asc_df_B000RT9BH2/?tag=hyprod-20&linkCode=df0&hvadid=312682342520&hvpos=&hvnetw=g&hvrand=14771575602520561094&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9027624&hvtargid=pla-450554422311&psc=1&tag=&ref=&adgrpid=69090714864&hvpone=&hvptwo=&hvadid=312682342520&hvpos=&hvnetw=g&hvrand=14771575602520561094&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9027624&hvtargid=pla-450554422311

[572Camaro]

I honestly don’t know.
If I make the purchase, I will post results.
Thanks for your help.
Funny thing: my tool cost $3.50 in the 70’s