[rdorman]

Well, I pulled a couple of plugs and have them setting on my desk to ship to you. When you get them, if you could post here when you get a chance to look at them that would be great, then perhaps I can share what comes out of it and we can all benefit.

I don't have a picture to post and my eyesite is not what it used to be but here is a general description of what they look like.

- Both look to be very similar.

-Threads appear to be discolored about 1.5 to 2 threads down. Dry for the most part with some signs of the antiseeze I always put on them.

- Ground strap is a tannish grey. The color is very even across the horizontal part above the electode. The moment the ground strap begins to turn down toward the body, the strap slowly gets darker until it becomes a dull black about 1/16" above the body, even with the top of the porcelain.

- The top of the threaded body has a very light, but even dull black color. Actually, the same color and amount of coating appears to extend all the way to the bottom of the threaded body on the inside of the plug.

- The electrode is the same color as the ground strap above it, except the very end of the electrode, on the flat only, is also a dull black color.

- The top of the porcelain is off-white. The moment the porcelain begins to drop down into the body, there is a tan ring. The ring does not go all the way around the top but rather stops shy of the ground strap on one side and come all the way to the ground strap on the other. The depth of the ring varies from 1/16 to 3/32". Immediately below that top ring is a very narrow off white ring, same color at the tip of the porcelain. About .020 to .030 in width. Below that, and as far as I can see with the naked eye, the plug is once again the same tan color as the top ring and continues all the way down.

It looks most like plug 19 or 23 from your chart. I will be interested in what you have to say!.

Thanks
Rick