F-18: 2 vs. 3 hook

[fightingfish]

Anyone have some insight? I recently acquired a F-18 BM with the black "original rapala" on the bill and the black "Finland" on the belly. It has three hooks. Looking around, it appears like some might only have two hooks. So, without researching, my first thought was to see if anyone here had already figured this out.

[cdj711]

Hi.

I think the 2-hook version was the salt water model F-18, presumably before the magnum came out.
so these are quite old, I would say 60´s.
and it looks to me the B was at first called BM, dont know when they changed, but again, long time ago.

best,
w.