capt bills lures, question on hook holders

[stripercrazy]

got a capt bill swimmer on e-bay, a beater and I looked at the hook holders and wonder it someone tampered with it. it don't have swivels or screw eyes. it looks like some one made a loop like the loop in the frount of a medal liped swimmer and then bent the wire like a u , so the loops on the bottom the wire gos up into the hook hole and turns in a u back down. the the thru wire go thru and holds the looped wire in.is this factory or did some one mess with it. the hole ain't a clean drill, kind of a mess, but then again its old and used. the thru wire looks like brass and old. I've never owned one before, lived near the old atom factory. had tons of 2nds. thanks ed