Here is a very rear Piece  Marked C C L on the left side.
If you collect vintage lures this is a must have.
I was told this was made for design purposes for the wood poppers. around the mid 20's to early 1930's.
It is 5" long & is 2.1oz  wire thru design white with real metalflake. and has  1mm or 2mm. glass eyes.