Reading plugs

[Rabid]

Here are the 2 plugs from thee 97.

Just wondering if I'm headed in the right direction.

 

[glsmohio]

what's the model?

 

[mikidymac]

In my opinion the plugs look fine if not a little rich. Unfortunalty reading plugs is an art and to do it correctly you need to do an accurate plug chop. Even then you are actually reading the porcelain down in the plug not the top part seen in your photos.