Mattel The Littles die cast metal vintage dollhouse furniture armoire epoch ?

This is an awesome set — the bed bedding and armoire are from Mattel’s 1980s The Littles collection. The lamps match but I can’t find them anywhere online. They have wires that look like they once plugged into something. Thinking late 1970s but don’t know. Doors and drawer or the armoire open. There’s a wee little basket included (vintage replica but not vintage) The birth certificate is a little extra. Awesome little set of 6 pieces.