Buttplate recognition

[riq21]

Does anyone out there have the very discriptive post/pictures of the difference of the buttplates amonst all the mfg's? I see it pop up occasionally, but find I need it today as I have just come accross a pile of these and want to sort them.
Thanks in advance.
Rick

[JimF4m1s]

Here is one.

http://www.chestnutridge.com/images/inv/CPBP2.asp