Your question was about the 6/3 I imagine, so what we need is a close-up of the 6. There looks to be a little something there but there's no way to tell from the photo - too grainy when blown-up. Buy a small $20-$30 microscope camera on ebay.
We really need an obverse pic to help you. There are three different 1886 obverse and two reverses,in four different combinations. Each type has a repunched 6 variety. There is no 6/3 it is 6/7. 6/7 only appears with the long bough end reverse, your coin is short bough end so that eliminates it being 6/7. Obverse pics please so we can pigeonhole it.
"Dipping" is not considered cleaning... -from PCGS website
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