ID and age help on two early shoe/knee buckles?

[CTwoods]

Recently found these at a very old undocumented site. Can you add any info on approximate dates, or anything worth mentioning? I'm trying to get dates on this field location. (4 coins found range from a 1726 One reale, a 1802 Draped bust cent, a 1817 US large cent, and a slick copper that is slightly smaller than a Large cent, but has more brass mix than a big copper has) I put a Kennedy Half in the pic for size comparisons. The other slick coin was from another site, and this pic does not show all the 4 coins from the field

the small knee buckle is all brass, and the design pattern seems like it must be quite early?

the big shoe buckle is broken by plowing, and must have been at least 4 inches wide, and the height is 2-3/4 inches. Pretty fancy designs on this one too. But why is it so large, and the cross bar is so offset to one side? Age?


Some pieces of other broken shoe buckles are in the pic as well.

 

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[CTwoods]

My pic in post one has coins from other places, so here are the 4 coins from the field I am trying to figure out when it was first occupied;