"Well, of all the coincidences! You are the proud owner of a lure bearing my surname and made about fifty miles from my hometown of Duluth, Minnesota. Of course, up there you can't throw a rock and not hit a Larson (only a Swede who spells their name Larsen would actually throw a rock at a Larson, but I digress). You've got a genuine Larson Fishtrap Weedless Spoon made in the late 1940s and 1950s and on down to the present. It was a product of the fertile mind of Karl R. Larson of Aitken, Minnesota, who held a number of important weedless lure patents, and was covered by Patent #2,629,199 issued on Feb. 24, 1953. The Fishtrap must have caught fish because not only are they common, but the lure was manufactured by at least three companies--the Larson Bait Co. of Aitkin, MN, the Weedless Bait Co. of Rogers, MN in the 1970s, and Fred Arbogast in the 1980s and beyond. The spoon itself is not rare and worth about $10-$15; however, yours has the very rare frog trailer (there was also a minnow trailer) and that alone is worth $50-$75. It's a classic weedless spoon with space age aesthetics. To see the original patents, the proper box for this lure, and an advertisement from the May 1975 Field & Stream, click here."