Originally Posted by
bulgie
"Triplizer" isn't strictly defined (in any dictionary I know of), but I think your crank is just a triple. It started out as a triple, where triplizer to me implies it was turned into a triple after it left the factory.
I think that's correct. You can see in the OP's original photo that the flutings on the spider arms stop short of the drilled and tapped holes that secure the inner ring. That was the case on the factory versions, I believe. Double cranks had longer flutings, so when the arms are drilled and tapped for a third ring, those holes are located with the flutes.