PO Box 377, Mason, Iowa 50402
About Auction House Welcome to the Seeck Auctions Website. Our auction company consists of Jim, Jan, Gannon & Carly Seeck. We make our home in Mason City, Iowa. Jim has been auctioning since 1982 with an emphasis in Carnival Glass the last 32 years. We also conduct auctions consisting of Watt Pottery, Graniteware, Stoneware and other miscellaneous antiques including antique estates. Specialty auctions are our specialty!