In my researching the 2-Feather variety of Buffalo/Indian Head Nickels, I came across this website: http://www.maddieclashes.com/denominational-overlays/ I really like the way it is put together. One can 'see' where the term 'whiskers' under the Indian's chin might come from--PLURIBUS from the reverse design. Probably the most important thing I have learned (so far) is that the opposite images are in the field of the the affected coin, the highest portion of the die.