It all depends on the cage that is fitted to the parallelogram body, particularly the distance between the lower pivot mount and the upper pulley axle-bolt. Every Criterium I have seen uses the "CP" cage. The "T" cage has the pivot mount closer to the upper pulley axle than the more race-oriented "CP"cage. There is also the GT, which is obviously longer than either of these two cages.
In this photo, the T cage is on the left, CP on the right. I recently replaced the CP cage on a Criterium with a GT cage from a SX-810 that was probably 10 years newer, but same threads!
Here is the Simplex model number de-coder chart. The type of cage isn't stamped on the body, so you need to visually differentiate them based on the pivot mount location and cage length.
Lots of catalogs here:
https://labibleduvelocataloguessimplex.blogspot.com/
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Last edited by Schreck83; 07-26-24 at 11:52 AM.
Reason: spellin. corrected the cage found on the Criterium to CP