Hot Rods Stewart Warner 8k Tach Pin Designation " stumped"

Any wire designation idea's on this old SW Tach..? I spoke to SW directly but too old to verify.. Also spoke to an old fella that's fixed them for 50 years and no luck there either...Insulators on a couple of pins... as far as I know it doesn't need an external control box.. Part # I believe is 960BF but it's super faded... any thoughts would be welcome.. thanks folks... d

 

If no sender needed, one has to be to the distributor side of the coil, and the other most likely would be the power or hot, source. Here are a couple of pictures from similar post from Feb, 2020...the 960 series was no longer listed by 1968.

 

That photo is my tach. Moriarty and I agree on the wiring schematic.
Phil

 

Bob .... Terrific man.. thank-you so much .... Dave

 

Now that's slick.... seen it done with my Dodge distributor, not near as nice a machine as that Sun but you can really dial your curve... awesome thanks much! d

 

Thanks Phil... d

 

10-4 tx dR

 

Well I grew a pair today hooked the old tach up to my Dart .... gritted my teeth and touched the power post to 12 volts and it came to life... whooo I didn't buy a dud after all.... lol... win... ! Thanks again to the folks that took a minute reply... good job...much appreciated...