"broken pole" pattern
from a book of traditional knitting patterns from Gotland (a Swedish island). There are plenty of goofy flower and vine patterns, but among them are a couple gorgeous geometric ones. The Swedish Mitten Book, Inger and Ingrid Gottfridsson, © 1984 Lark Books.
Also: the book was originally published in Sweden under the title Gotlandska Stickmonster. "Stickmonster" is "knitting patterns" in Swedish!