First, welcome to the forums. I think your items are picture hangers probably brass and date to the house site age. They would have hung on a wood rail around the perimeter of a room and pictures would hang from cords looped over them. Am I clear as mud? Google picture rail hangers and you will see what I am talking about.
1st - I noticed this was your very first post - so, Welcome Aboard NJseba! You didn't list your state (or country) in your profile. So, you might consider jumping over to Sub-Forum: Select Your Area.... and selecting location information (i.e., clubs, hunts, finds, legends, maps, etc.) directly related to your state (or country).