What I'm trying to point out is the the style and placement of the arrows, coupled with the beads, (do we agree that they are beads?), coupled with the apparent location where it was found, and of course the period. The specific placement of arrows is regarded universally as the "friendship" symbol, and coupled with beads, seems to me anyway too farfetched a "design" in itself, and even more unlikely as an element of arms or crest, but makes perfect sense when viewed in the light of Indian-european relationships of a turbulent period.
Unlike Canada and the U.K., livery buttons are very rarely found in the north eastern United States. Out of well over a thousand colonial and federal buttons I've personally dug here, not one has been livery, yet many other far rarer varieties than livery have consistently surfaced. The northeast is not at all like the U.K. or Canada in this respect.
What constitutes "livery" other than the basic button's manufactured style coupled with what ever silvering and design? Virtually nothing, as manufactured style pertains to most livery or non-livery buttons from a certain era. Look at my monicker for instance. Had we not known of Washington or the inauguration, this button could very easily have fit this category of "livery" in its style.
The beads and the arrows to gather are I believe what distinguishes this button. Style is irrelevant, as is a 1780's to 90's timeframe (reasons already given in previous post) Do we have a concensus that those are beads?