Help me identify the Stewart Warner Tach part please!

Fellas,
I've attached 3 pictures of this Stewart Warner Tachometer part that I have. I don't know if you call it a relay, or a switch, or a sending unit.

The Model number is: 819893
Cylinder: 4
Cycle: 4
Volts: 6 12

Can you help a old HAMB'r out?

 

MAN O MAN! hold onto that baby! sending unit for many early S/W tachs. 6 & 12 volts makes it more desirable.

 

So, is it a Sending-Unit for a 4 cylinder engine only then?

 

yeah, but difficult to find in 6-12 volts dual apps. think model a 4 banger.

 

Anyone else have any information to offer up?

 

4 banger and some dual coil applications

 

Then I need to find me a banger-man ........

 

I dont have any gold but pm me with a price or I can sell you a tach to go with it
later Bill

 

Hello,
I had the same problem, I picked up this NOS tach, but cant seem to find out what it goes to as well. The number on the box is #381108
. Any help would be greatly apprciated! Thanks Bill