Helin Flatfish X4, SI Silver Dots Color. At first glance I believed this modified weedless hook was made from a fishermen. However the line tie and all the hardware is pretty solid. Additionally the mold on this X4 is different than a normal plastic Flatfish. It's with this evidence that I believe this marked X4 is a possibly a prototype or unique offshoot. About 2 1/2" long.  Used with only some minor wear and marks but still in overall good condition, see photos. One of the most successful fishing lures ever made.  Fish or collect!  Vintage plastic version.  Whatever this is, it's pretty cool.

See all of our vintage Helin lures for sale here.