This uber-rare 30 gallon salt glaze butterfly crock with “Red Wing Stoneware Co.” stenciled in cobalt is one of the many great pieces expected to be up for grabs at this year’s Red Wing Collectors Society Convention Members-only Auction at 4:30 p.m. on Thursday, July 12 at Red Wing High School (auction preview: 12:15 to 4:15 p.m.). To see more pieces submitted by members for this year’s auction, visit the “Annual Convention” tab on the Events/Annual Convention page of the RWCS website at www.redwingcollectors.org. The RWCS Convention runs from July 12-14 in Red Wing, Minn.