Collar Pif

Anyone know which wireless PetSafe collar preceeded the newer PIF 275-19?

I bought an IF 275 off ebay and it says there are just 3 levels of correction versus the pif 275-19 having 5 plus the tone only level. I wondered if my purchase was just advertised incorrectly or if I bought the old model. I'd read somewhere the "old" model was a #200. Thanks

I don't know the answer to your question, but I found this site that may be of use to you:

http://www.k9electronics.com/categories/shopbybrand/petsafe/PetSafeTrainingCollars.aspx

It gives a little information on the collars, and perhaps there is a list somewhere...