Hot Rods Need Help Remembering the Name or Mfg. of a Vintage Gage

Hey I haven't posted on here in a long time but looking through Ryan's thread on dashboards I thought of something today and the answer (or lack of it) is driving me nuts.
There was a gage that was often sold in the old J.C. Whitney and Almquist type catalogs..it had 8 little strobe light or indicator lamps that were arranged in a circular pattern which would flash to indicate the cylinders were firing ? At least I think that was the concept. I never owned one but I surmise they (the lamps) must have been triggered inductively and that there must have been a wire for each that was clipped to the corresponding plug wires. Maybe more of a gimmick than anything else but I wanted to see a picture of one again. I thought it was called a "Moto-Meter" or "Moto-Minder" but they don't match up.
I'm sure somebody here has one or remembers what I'm talking about.
Thanks in advance.

 

Wow that was fast ! Spark-O-Matic sounds right although the one I had pictured in my mind had round lights in a circular pattern vs those rectangular lights. That looks like a 6 cly version, maybe the V8 version was different or there were other imitators ? Or maybe the illustration in the catalogs was not completely accurate which was often the case. Or maybe I'm getting old and my memory is shot.
In any case that's a cool piece thanks for posting it. Save Gas - Avoid Trouble ! lol

 

Thanks Moriarity. Like I said I haven't been around here much the last few years but one thing I remember is you always had the coolest stuff in your collection.

 

One that I remember the lights indicated rpm; the more that lit up the higher the rpm.

 

Now that you gave me the name I was able to find a picture of the version I remember. Not sure if this was earlier or later.

 

And just found a copy of the instruction sheet that you had posted back in 2008

 

Yeah I'm still not clear exactly how it functioned. As you can see in the instruction sheet there was an inductive wire inserted next to each plug wire at the cap as Moriarity stated. I imagine each bulb flashing just like a timing light does.

 

That's wild! Never seen one.

 

If a guy was to use all the neat old gizmos that were sold.

 

Now I want something I never knew existed and wont do a bit of good. Thanks a lot!