I think these were most likely handmade in the 1960’s . These were decals that were purchased by the craftsperson who cut and beveled these wood plaques, applied a dark ebony stain to them, then affixed the decals. It was done quite well; the tell-tale “halo” from the edge of the transfer is barely visible and the images have stood the test of time.
This is the perfect addition to your Patriotic Americana 250th Independence Day decor.
They measure about 15” tall by about 7” wide, with a thickness just short of 1”