Though other denominations changed from narrow rim NSF to wide rim SF, only on the the 25 cents is the difference so readily apparent. The others require some familiarity with the series to identify by rim only and thus other markers are used.
"Dipping" is not considered cleaning... -from PCGS website
Thank you guys, I normally took the horns as markers. Perhaps by convenience as these young dates are outside my criteria. thank you. It is amazing how knowledgeable some of you are about the whole spectrum of numismatics thank you. for helping out.