(Four Flags, IA-22-20) NW of Guttenburg, Jefferson Township, Clayton County, IA. US52 N. (curves W.) 4.4 miles from jct with Main St. in Guttenburg to the quilt on the S. side of the road at 27793. Rick & Deb Hinzman. (N42 49.212 W91 08.211) Photos by Jack & June Schmidt 6-28-12.