>>212987466 (OP)those pictures have a tint that affects how they feel.
shape and color/tint are different feelings mixing together.
what we associate with eras is mostly the tint of the photographs from that era. sepia is just one tint.
imagine those shapes, but not the colors, as if you were standing in front of them right now. give them the color of "now" things.
they would feel very modern, not at all "old".