These two buckles came from the “old house” on our property where I grew up. The house belonged to my great-grandfather’s brother and his wife, who were married in the early 20th century. I expect that these would’ve been purchased in the early 1900s to 1930s, unless they had belonged to someone from the previous generation.
Here is a website showing fancier buckles and probably from an earlier time: http://www.morninggloryantiques.com/collectSash.html
If anyone knows what period these are actually from, just leave a comment.