did a bit of research... here is a link to the mold pic
https://custombaits.com/index.php?topic=12180.0
from the 2nd pic you can see more of the items needed to make them, it says 60lb nylostrand leader and a swivel. more info in the top pic, I remember seeing them, they were never popular in my area. now they make them as underspins. should be a fun one to build and try.
this is kinda what it will look like, except the one you have also uses the fiber weedguard.