(Twin Star, IA-22-18) 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 49.201 W91 09.485) Photos by Jack & June Schmidt 6-28-12.