Butterick 5589; ca. 1951; Poncho Tunic: Bateau or U-Shaped Necklines:Poncho Tunic: Bateau or U-Shaped Necklines: The poncho was the newest fashion rage. Wear it over everything from a swim-suit to a dress sheath skirt. No side seams, takes very little time to make. (B) has pockets, U-neckline. (C) Two turkish towels makes this poncho. Featured in Butterick Pattern Book Spring 1951, and in Butterick Pattern Book, Early Summer 1951