Both tumblers have two holes. I can tell by inspection that the new tumbler only has one spring clip. I can tell by 'feeling' that the old tumbler is pretty much the same way.

I don't know if the old tumbler has a collar. There is a trim piece over the old tumbler that has the position dots. I don't know how it comes off the tumbler but it should if it is to go on the new tumbler.

Sixto
91 300SE
87 300SDL
81 300SD