I wanted to post this one because it has some of the clearest markers for any
Buffalo nickel RPM, but Variety Vista and Wexler don't have pics of most of the markers. This is a Stage B example.
The RPM is D/D SE. It isn't a particularly hard RPM to locate if you use the markers. It is a fairly subtle RPM on circulated coins, though.
There are two key obverse markers:

Ridiculously heavy
Die Deterioration around the Indian's eye.

Heavy abrasions from the chin and neck, all the way to the rim.
There are three readily identifiable reverse markers:

A WNW-ESE scratch between the middle bar of the "E" of "FIVE" and the lower left side of the "C" in "CENTS." This marker is shown on Variety Vista.

A die chip or gouge that looks like a dot to the right of the inside left leg of the "N" in "UNUM."

A ridiculously long NE-SW scratch from the buffalo's abdomen toward the joint on the left front leg.
Here are the mug shots and RPM detail:



Here are the two obverse markers. They are readily visible to the unaided eye.
Indian's eye details:

Die scratches near the chin and neck:

Here are the three reverse markers. The E-C scratch fades as the die progresses from Stage A to B. The other two markers seem fairly constant through the stages.



Here are the same three reverse markers, with red arrows or a circle showing the locations.


