Wisconsin Licensed Journeyman Plumber Badges

This is a group of seven Wisconsin Licensed Journeyman Plumber Badges all from the same man, Carl Lange of La Crosse, Wisconsin. The badges are from the following years; 1923 missing pin catch, 1925, 1926, 1928,1929, 1930, 1931. All are in perfect used condition except for the 1923 as noted. The 1928 is marked by maker Schwaab of Milwaukee. The rest are not marked but surely also Schwaab products. Each is about 30mm in diameter and die struck metal with a gold or silver finish. The 1931 is printed on thin metal like a political lapel pin. Also included are five large wallet size license certificates for the years; 1926, 1927, 1928, 1930, 1931, all of which look like they are paper mounted on heavy threaded cloth or parchment. Each is about 4 ¼ by 2 ¾ inches in size. All are in used condition with pin holes. These badges are rarely seen on ebay and usually sell for between $10.-$15 each. The certificates as far as I know are never seen on ebay which probably makes this large grouping unique.